BusyBox - The Swiss Army Knife of Embedded Linux
busybox <applet> [arguments...] # or
<applet> [arguments...] # if symlinked
BusyBox combines tiny versions of many common UNIX utilities into a single small executable. It provides minimalist replacements for most of the utilities you usually find in GNU coreutils, util-linux, etc. The utilities in BusyBox generally have fewer options than their full-featured GNU cousins; however, the options that are included provide the expected functionality and behave very much like their GNU counterparts.
BusyBox has been written with size-optimization and limited resources in mind. It is also extremely modular so you can easily include or exclude commands (or features) at compile time. This makes it easy to customize your embedded systems. To create a working system, just add /dev, /etc, and a Linux kernel. BusyBox provides a fairly complete POSIX environment for any small or embedded system.
BusyBox is extremely configurable. This allows you to include only the components you need, thereby reducing binary size. Run 'make config' or 'make menuconfig' to select the functionality that you wish to enable. Then run 'make' to compile BusyBox using your configuration.
After the compile has finished, you should use 'make install' to install BusyBox. This will install the 'bin/busybox' binary, in the target directory specified by CONFIG_PREFIX. CONFIG_PREFIX can be set when configuring BusyBox, or you can specify an alternative location at install time (i.e., with a command line like 'make CONFIG_PREFIX=/tmp/foo install'). If you enabled any applet installation scheme (either as symlinks or hardlinks), these will also be installed in the location pointed to by CONFIG_PREFIX.
BusyBox is a multi-call binary. A multi-call binary is an executable program that performs the same job as more than one utility program. That means there is just a single BusyBox binary, but that single binary acts like a large number of utilities. This allows BusyBox to be smaller since all the built-in utility programs (we call them applets) can share code for many common operations.
You can also invoke BusyBox by issuing a command as an argument on the command line. For example, entering
/bin/busybox ls
will also cause BusyBox to behave as 'ls'.
Of course, adding '/bin/busybox' into every command would be painful. So most people will invoke BusyBox using links to the BusyBox binary.
For example, entering
ln -s /bin/busybox ls
./ls
will cause BusyBox to behave as 'ls' (if the 'ls' command has been compiled into BusyBox). Generally speaking, you should never need to make all these links yourself, as the BusyBox build system will do this for you when you run the 'make install' command.
If you invoke BusyBox with no arguments, it will provide you with a list of the applets that have been compiled into your BusyBox binary.
Most BusyBox applets support the --help argument to provide a terse runtime description of their behavior. If the CONFIG_FEATURE_VERBOSE_USAGE option has been enabled, more detailed usage information will also be available.
Currently available applets include:
[, [[, addgroup, adduser, adjtimex, ar, arp, arping, ash, awk,
basename, bbconfig, blkid, bootchartd, bunzip2, bzcat, bzip2, cal,
cat, catv, chattr, chgrp, chmod, chown, chroot, chrt, chvt, cksum,
clear, cmp, comm, cp, cpio, crond, crontab, cut, date, dc, dd,
deallocvt, delgroup, deluser, depmod, devmem, df, dhcprelay, diff,
dirname, dmesg, dnsd, dnsdomainname, dos2unix, du, dumpkmap, echo,
ed, egrep, env, ether-wake, expand, expr, fakeidentd, false, fbset,
fbsplash, fdflush, fgconsole, fgrep, find, findfs, flock, fold,
free, freeramdisk, fsck, fsync, ftpget, ftpput, fuser, getopt,
getty, grep, gunzip, gzip, halt, hd, head, hexdump, hostid,
hostname, httpd, hwclock, id, ifconfig, ifdown, ifup, inetd, init,
insmod, install, ionice, ip, ipaddr, ipcalc, ipcrm, ipcs, iplink,
iproute, iprule, iptunnel, kbd_mode, kill, killall, killall5, klogd,
last, length, less, linuxrc, ln, loadfont, loadkmap, logger, login,
logname, logread, losetup, ls, lsattr, lsmod, lsusb, lzcat, lzma,
lzop, lzopcat, md5sum, mdev, mesg, microcom, mkdir, mkdosfs, mke2fs,
mkfifo, mkfs.ext2, mkfs.vfat, mknod, mkswap, mktemp, modinfo,
modprobe, more, mount, mountpoint, mv, nameif, netstat, nice,
nmeter, nohup, nslookup, ntpd, od, openvt, passwd, patch, pgrep,
pidof, ping, pipe_progress, pivot_root, pkill, poweroff, printenv,
printf, ps, pscan, pwd, rdate, rdev, readahead, readlink,
readprofile, realpath, reboot, renice, reset, resize, rfkill, rm,
rmdir, rmmod, route, rtcwake, run-parts, runlevel, rx, script,
scriptreplay, sed, seq, setconsole, setfont, setkeycodes,
setlogcons, setsid, sh, sha1sum, sha256sum, sha512sum, showkey,
sleep, smemcap, sort, split, start-stop-daemon, stat, strings, stty,
su, sulogin, sum, swapoff, swapon, switch_root, sync, sysctl,
syslogd, tac, tail, tar, tcpsvd, tee, telnet, telnetd, test, tftp,
tftpd, time, timeout, top, touch, tr, traceroute, true, tty,
ttysize, tune2fs, ubiattach, ubidetach, udhcpc, udhcpd, udpsvd,
umount, uname, unexpand, uniq, unix2dos, unlzma, unlzop, unxz,
unzip, uptime, usleep, uudecode, uuencode, vconfig, vi, vlock,
watch, wc, wget, which, who, whoami, xargs, xz, xzcat, yes, zcat,
zcip
addgroup [-g GID] [USER] GROUP
Add a group or add a user to a group
Options:
-g GID Group id
-S Create a system group
adduser [OPTIONS] USER
Add a user
Options:
-h DIR Home directory
-g GECOS GECOS field
-s SHELL Login shell
-G GRP Add user to existing group
-S Create a system user
-D Don't assign a password
-H Don't create home directory
-u UID User id
adjtimex [-q] [-o OFF] [-f FREQ] [-p TCONST] [-t TICK]
Read and optionally set system timebase parameters. See adjtimex(2)
Options:
-q Quiet
-o OFF Time offset, microseconds
-f FREQ Frequency adjust, integer kernel units (65536 is 1ppm)
(positive values make clock run faster)
-t TICK Microseconds per tick, usually 10000
-p TCONST
ar [-o] [-v] [-p] [-t] [-x] ARCHIVE FILES
Extract or list FILES from an ar archive
Options:
-o Preserve original dates
-p Extract to stdout
-t List
-x Extract
-v Verbose
| arp | |
| [-vn] | [-H HWTYPE] [-i IF] -a [HOSTNAME] |
| [-v] | [-i IF] -d HOSTNAME [pub] |
| [-v] | [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [temp] |
| [-v] | [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [netmask MASK] pub |
| [-v] | [-H HWTYPE] [-i IF] -Ds HOSTNAME IFACE [netmask MASK] pub |
Manipulate ARP cache
Options:
-a Display (all) hosts
-s Set new ARP entry
-d Delete a specified entry
-v Verbose
-n Don't resolve names
-i IF Network interface
-D Read <hwaddr> from given device
-A, -p AF Protocol family
-H HWTYPE Hardware address type
arping [-fqbDUA] [-c CNT] [-w TIMEOUT] [-I IFACE] [-s SRC_IP] DST_IP
Send ARP requests/replies
Options:
-f Quit on first ARP reply
-q Quiet
-b Keep broadcasting, don't go unicast
-D Duplicated address detection mode
-U Unsolicited ARP mode, update your neighbors
-A ARP answer mode, update your neighbors
-c N Stop after sending N ARP requests
-w TIMEOUT Time to wait for ARP reply, seconds
-I IFACE Interface to use (default eth0)
-s SRC_IP Sender IP address
DST_IP Target IP address
awk [OPTIONS] [AWK_PROGRAM] [FILE]...
Options:
-v VAR=VAL Set variable
-F SEP Use SEP as field separator
-f FILE Read program from FILE
basename FILE [SUFFIX]
Strip directory path and .SUFFIX from FILE
bbconfig
Print the config file used by busybox build
blkid
Print UUIDs of all filesystems
bootchartd start [PROG ARGS]|stop|init
Create /var/log/bootchart.tgz with boot chart data
Options:
start: start background logging; with PROG, run PROG, then kill logging with USR1 stop: send USR1 to all bootchartd processes init: start background logging; stop when getty/xdm is seen (for init scripts) Under PID 1: as init, then exec $bootchart_init, /init, /sbin/init
bunzip2 [OPTIONS] [FILE]...
Decompress FILEs (or stdin)
Options:
-c Write to stdout
-f Force
bzcat FILE
Decompress to stdout
bzip2 [OPTIONS] [FILE]...
Compress FILEs (or stdin) with bzip2 algorithm
Options:
-1..9 Compression level
-d Decompress
-c Write to stdout
-f Force
cal [-jy] [[MONTH] YEAR]
Display a calendar
Options:
-j Use julian dates
-y Display the entire year
cat [FILE]...
Concatenate FILEs and print them to stdout
catv [-etv] [FILE]...
Display nonprinting characters as ^x or M-x
Options:
-e End each line with $
-t Show tabs as ^I
-v Don't use ^x or M-x escapes
chattr [-R] [-+=AacDdijsStTu] [-v VERSION] [FILE]...
Change file attributes on an ext2 fs
Modifiers:
- Remove attributes
+ Add attributes
= Set attributes
Attributes:
A Don't track atime
a Append mode only
c Enable compress
D Write dir contents synchronously
d Don't backup with dump
i Cannot be modified (immutable)
j Write all data to journal first
s Zero disk storage when deleted
S Write file contents synchronously
t Disable tail-merging of partial blocks with other files
u Allow file to be undeleted
Options:
-R Recurse
-v Set the file's version/generation number
chgrp [-RhLHP]... GROUP FILE...
Change the group membership of each FILE to GROUP
Options:
-R Recurse
-h Affect symlinks instead of symlink targets
-L Traverse all symlinks to directories
-H Traverse symlinks on command line only
-P Don't traverse symlinks (default)
chmod [-R] MODE[,MODE]... FILE...
Each MODE is one or more of the letters ugoa, one of the symbols +-= and one or more of the letters rwxst
Options:
-R Recurse
chown [-RhLHP]... OWNER[<.|:>[GROUP]] FILE...
Change the owner and/or group of each FILE to OWNER and/or GROUP
Options:
-R Recurse
-h Affect symlinks instead of symlink targets
-L Traverse all symlinks to directories
-H Traverse symlinks on command line only
-P Don't traverse symlinks (default)
chroot NEWROOT [PROG ARGS]
Run PROG with root directory set to NEWROOT
chrt [OPTIONS] [PRIO] [PID | PROG ARGS]
Change scheduling priority and class for a process
Options:
-p Operate on PID
-r Set SCHED_RR class
-f Set SCHED_FIFO class
-o Set SCHED_OTHER class
-m Show min/max priorities
chvt N
Change the foreground virtual terminal to /dev/ttyN
cksum FILES...
Calculate the CRC32 checksums of FILES
clear
Clear screen
cmp [-l] [-s] FILE1 [FILE2]
Compare FILE1 with FILE2 (or stdin)
Options:
-l Write the byte numbers (decimal) and values (octal)
for all differing bytes
-s Quiet
comm [-123] FILE1 FILE2
Compare FILE1 with FILE2
Options:
-1 Suppress lines unique to FILE1
-2 Suppress lines unique to FILE2
-3 Suppress lines common to both files
cp [OPTIONS] SOURCE DEST
Copy SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY
Options:
-a Same as -dpR
-R,-r Recurse
-d,-P Preserve symlinks (default if -R)
-L Follow all symlinks
-H Follow symlinks on command line
-p Preserve file attributes if possible
-f Overwrite
-i Prompt before overwrite
-l,-s Create (sym)links
cpio [-dmvu] [-F FILE] [-H newc] [-tio] [-p DIR]
Extract or list files from a cpio archive, or create an archive (-o) or copy files (-p) using file list on stdin
Main operation mode:
-t List
-i Extract
-o Create (requires -H newc)
-p DIR Copy files to DIR
Options:
-d Make leading directories
-m Preserve mtime
-v Verbose
-u Overwrite
-F FILE Input (-t,-i,-p) or output (-o) file
-H newc Archive format
crond -fbS -l N -d N -L LOGFILE -c DIR
-f Foreground
-b Background (default)
-S Log to syslog (default)
-l Set log level. 0 is the most verbose, default 8
-d Set log level, log to stderr
-L Log to file
-c Working dir
crontab [-c DIR] [-u USER] [-ler]|[FILE]
-c Crontab directory
-u User
-l List crontab
-e Edit crontab
-r Delete crontab
FILE Replace crontab by FILE ('-': stdin)
cut [OPTIONS] [FILE]...
Print selected fields from each input FILE to stdout
Options:
-b LIST Output only bytes from LIST
-c LIST Output only characters from LIST
-d CHAR Use CHAR instead of tab as the field delimiter
-s Output only the lines containing delimiter
-f N Print only these fields
-n Ignored
date [OPTIONS] [+FMT] [TIME]
Display time (using +FMT), or set time
Options:
[-s,--set] TIME Set time to TIME
-u,--utc Work in UTC (don't convert to local time)
-R,--rfc-2822 Output RFC-2822 compliant date string
-I[SPEC] Output ISO-8601 compliant date string
SPEC='date' (default) for date only,
'hours', 'minutes', or 'seconds' for date and
time to the indicated precision
-r,--reference FILE Display last modification time of FILE
-d,--date TIME Display TIME, not 'now'
-D FMT Use FMT for -d TIME conversion
Recognized TIME formats:
hh:mm[:ss]
[YYYY.]MM.DD-hh:mm[:ss]
YYYY-MM-DD hh:mm[:ss]
[[[[[YY]YY]MM]DD]hh]mm[.ss]
dc expression...
Tiny RPN calculator. Operations: +, add, -, sub, *, mul, /, div, %, mod, **, exp, and, or, not, eor, p - print top of the stack (without altering the stack), f - print entire stack, o - pop the value and set output radix (value must be 10 or 16). Examples: 'dc 2 2 add' -> 4, 'dc 8 8 * 2 2 + /' -> 16
| dd [if=FILE] [of=FILE] [ibs=N] [obs=N] [bs=N] [count=N] [skip=N] | |
| [seek=N] [conv=notrunc|noerror|sync|fsync] |
Copy a file with converting and formatting
Options:
if=FILE Read from FILE instead of stdin
of=FILE Write to FILE instead of stdout
bs=N Read and write N bytes at a time
ibs=N Read N bytes at a time
obs=N Write N bytes at a time
count=N Copy only N input blocks
skip=N Skip N input blocks
seek=N Skip N output blocks
conv=notrunc Don't truncate output file
conv=noerror Continue after read errors
conv=sync Pad blocks with zeros
conv=fsync Physically write data out before finishing
Numbers may be suffixed by c (x1), w (x2), b (x512), kD (x1000), k (x1024), MD (x1000000), M (x1048576), GD (x1000000000) or G (x1073741824)
deallocvt [N]
Deallocate unused virtual terminal /dev/ttyN
delgroup [USER] GROUP
Delete group GROUP from the system or user USER from group GROUP
deluser USER
Delete USER from the system
depmod [-qfwrsv] MODULE [symbol=value]...
Options:
-r Remove MODULE (stacks) or do autoclean
-q Quiet
-v Verbose
-f Force
-w Wait for unload
-s Report via syslog instead of stderr
devmem ADDRESS [WIDTH [VALUE]]
Read/write from physical address
ADDRESS Address to act upon
WIDTH Width (8/16/...)
VALUE Data to be written
df [-Pkmhai] [-B SIZE] [FILESYSTEM]...
Print filesystem usage statistics
Options:
-P POSIX output format
-k 1024-byte blocks (default)
-m 1M-byte blocks
-h Human readable (e.g. 1K 243M 2G)
-a Show all filesystems
-i Inodes
-B SIZE Blocksize
dhcprelay CLIENT_IFACE[,CLIENT_IFACE2]... SERVER_IFACE [SERVER_IP]
Relay DHCP requests between clients and server
diff [-abBdiNqrTstw] [-L LABEL] [-S FILE] [-U LINES] FILE1 FILE2
Compare files line by line and output the differences between them. This implementation supports unified diffs only.
Options:
-a Treat all files as text
-b Ignore changes in the amount of whitespace
-B Ignore changes whose lines are all blank
-d Try hard to find a smaller set of changes
-i Ignore case differences
-L Use LABEL instead of the filename in the unified header
-N Treat absent files as empty
-q Output only whether files differ
-r Recurse
-S Start with FILE when comparing directories
-T Make tabs line up by prefixing a tab when necessary
-s Report when two files are the same
-t Expand tabs to spaces in output
-U Output LINES lines of context
-w Ignore all whitespace
dirname FILENAME
Strip non-directory suffix from FILENAME
dmesg [-c] [-n LEVEL] [-s SIZE]
Print or control the kernel ring buffer
Options:
-c Clear ring buffer after printing
-n LEVEL Set console logging level
-s SIZE Buffer size
dnsd [-dvs] [-c CONFFILE] [-t TTL_SEC] [-p PORT] [-i ADDR]
Small static DNS server daemon
Options:
-c FILE Config file
-t SEC TTL
-p PORT Listen on PORT
-i ADDR Listen on ADDR
-d Daemonize
-v Verbose
-s Send successful replies only. Use this if you want
to use /etc/resolv.conf with two nameserver lines:
nameserver DNSD_SERVER
nameserver NORNAL_DNS_SERVER
dos2unix [OPTIONS] [FILE]
Convert FILE in-place from DOS to Unix format. When no file is given, use stdin/stdout.
Options:
-u dos2unix
-d unix2dos
du [-aHLdclsxhmk] [FILE]...
Summarize disk space used for each FILE and/or directory. Disk space is printed in units of 1024 bytes.
Options:
-a Show file sizes too
-L Follow all symlinks
-H Follow symlinks on command line
-d N Limit output to directories (and files with -a) of depth < N
-c Show grand total
-l Count sizes many times if hard linked
-s Display only a total for each argument
-x Skip directories on different filesystems
-h Sizes in human readable format (e.g., 1K 243M 2G )
-m Sizes in megabytes
-k Sizes in kilobytes (default)
dumpkmap > keymap
Print a binary keyboard translation table to stdout
echo [-neE] [ARG]...
Print the specified ARGs to stdout
Options:
-n Suppress trailing newline
-e Interpret backslash escapes (i.e., \t=tab)
-E Don't interpret backslash escapes (default)
ed
env [-iu] [-] [name=value]... [PROG ARGS]
Print the current environment or run PROG after setting up the specified environment
Options:
-, -i Start with an empty environment
-u Remove variable from the environment
ether-wake [-b] [-i iface] [-p aa:bb:cc:dd[:ee:ff]] MAC
Send a magic packet to wake up sleeping machines. MAC must be a station address (00:11:22:33:44:55) or a hostname with a known 'ethers' entry.
Options:
-b Send wake-up packet to the broadcast address
-i iface Interface to use (default eth0)
-p pass Append four or six byte password PW to the packet
expand [-i] [-t N] [FILE]...
Convert tabs to spaces, writing to stdout
Options:
-i,--initial Don't convert tabs after non blanks
-t,--tabs=N Tabstops every N chars
expr EXPRESSION
Print the value of EXPRESSION to stdout
EXPRESSION may be:
ARG1 | ARG2 ARG1 if it is neither null nor 0, otherwise ARG2
ARG1 & ARG2 ARG1 if neither argument is null or 0, otherwise 0
ARG1 < ARG2 1 if ARG1 is less than ARG2, else 0. Similarly:
ARG1 <= ARG2
ARG1 = ARG2
ARG1 != ARG2
ARG1 >= ARG2
ARG1 > ARG2
ARG1 + ARG2 Sum of ARG1 and ARG2. Similarly:
ARG1 - ARG2
ARG1 * ARG2
ARG1 / ARG2
ARG1 % ARG2
STRING : REGEXP Anchored pattern match of REGEXP in STRING
match STRING REGEXP Same as STRING : REGEXP
substr STRING POS LENGTH Substring of STRING, POS counted from 1
index STRING CHARS Index in STRING where any CHARS is found, or 0
length STRING Length of STRING
quote TOKEN Interpret TOKEN as a string, even if
it is a keyword like 'match' or an
operator like '/'
(EXPRESSION) Value of EXPRESSION
Beware that many operators need to be escaped or quoted for shells. Comparisons are arithmetic if both ARGs are numbers, else lexicographical. Pattern matches return the string matched between \( and \) or null; if \( and \) are not used, they return the number of characters matched or 0.
fakeidentd [-fiw] [-b ADDR] [STRING]
Provide fake ident (auth) service
Options:
-f Run in foreground
-i Inetd mode
-w Inetd 'wait' mode
-b ADDR Bind to specified address
STRING Ident answer string (default: nobody)
false
Return an exit code of FALSE (1)
fbset [OPTIONS] [MODE]
Show and modify frame buffer settings
fbsplash -s IMGFILE [-c] [-d DEV] [-i INIFILE] [-f CMD]
Options:
-s Image
-c Hide cursor
-d Framebuffer device (default /dev/fb0)
-i Config file (var=value):
BAR_LEFT,BAR_TOP,BAR_WIDTH,BAR_HEIGHT
BAR_R,BAR_G,BAR_B
-f Control pipe (else exit after drawing image)
commands: 'NN' (% for progress bar) or 'exit'
fdflush DEVICE
Force floppy disk drive to detect disk change
fgconsole
Get active console
find [PATH]... [EXPRESSION]
Search for files. The default PATH is the current directory, default EXPRESSION is '-print'
EXPRESSION may consist of:
-follow Follow symlinks
-xdev Don't descend directories on other filesystems
-maxdepth N Descend at most N levels. -maxdepth 0 applies
tests/actions to command line arguments only
-mindepth N Don't act on first N levels
-name PATTERN File name (w/o directory name) matches PATTERN
-iname PATTERN Case insensitive -name
-path PATTERN Path matches PATTERN
-regex PATTERN Path matches regex PATTERN
-type X File type is X (X is one of: f,d,l,b,c,...)
-perm NNN Permissions match any of (+NNN), all of (-NNN),
or exactly NNN
-mtime DAYS Modified time is greater than (+N), less than (-N),
or exactly N days
-mmin MINS Modified time is greater than (+N), less than (-N),
or exactly N minutes
-newer FILE Modified time is more recent than FILE's
-inum N File has inode number N
-user NAME File is owned by user NAME (numeric user ID allowed)
-group NAME File belongs to group NAME (numeric group ID allowed)
-depth Process directory name after traversing it
-size N[bck] File size is N (c:bytes,k:kbytes,b:512 bytes(def.))
+/-N: file size is bigger/smaller than N
-links N Number of links is greater than (+N), less than (-N),
or exactly N
-print Print (default and assumed)
-print0 Delimit output with null characters rather than
newlines
-exec CMD ARG ; Run CMD with all instances of {} replaced by the
matching files
-prune Stop traversing current subtree
-delete Delete files, turns on -depth option
(EXPR) Group an expression
findfs LABEL=label or UUID=uuid
Find a filesystem device based on a label or UUID
flock [-sxun] FD|{FILE [-c] PROG ARGS}
[Un]lock file descriptor, or lock FILE, run PROG
Options:
-s Shared lock
-x Exclusive lock (default)
-u Unlock FD
-n Fail rather than wait
fold [-bs] [-w WIDTH] [FILE]...
Wrap input lines in each FILE (or stdin), writing to stdout
Options:
-b Count bytes rather than columns
-s Break at spaces
-w Use WIDTH columns instead of 80
free
Display the amount of free and used system memory
freeramdisk DEVICE
Free all memory used by the specified ramdisk
fsck [-ANPRTV] [-C FD] [-t FSTYPE] [FS_OPTS] [BLOCKDEV]...
Check and repair filesystems
Options:
-A Walk /etc/fstab and check all filesystems
-N Don't execute, just show what would be done
-P With -A, check filesystems in parallel
-R With -A, skip the root filesystem
-T Don't show title on startup
-V Verbose
-C n Write status information to specified filedescriptor
-t TYPE List of filesystem types to check
fsync [OPTIONS] FILE...
Write files' buffered blocks to disk
Options:
-d Avoid syncing metadata
ftpget [OPTIONS] HOST [LOCAL_FILE] REMOTE_FILE
Retrieve a remote file via FTP
Options:
-c,--continue Continue previous transfer
-v,--verbose Verbose
-u,--username Username
-p,--password Password
-P,--port Port number
ftpput [OPTIONS] HOST [REMOTE_FILE] LOCAL_FILE
Store a local file on a remote machine via FTP
Options:
-v,--verbose Verbose
-u,--username Username
-p,--password Password
-P,--port Port number
fuser [OPTIONS] FILE or PORT/PROTO
Find processes which use FILEs or PORTs
Options:
-m Find processes which use same fs as FILEs
-4 Search only IPv4 space
-6 Search only IPv6 space
-s Don't display PIDs
-k Kill found processes
-SIGNAL Signal to send (default: KILL)
getopt [OPTIONS]
Options:
-a,--alternative Allow long options starting with single -
-l,--longoptions=longopts Long options to be recognized
-n,--name=progname The name under which errors are reported
-o,--options=optstring Short options to be recognized
-q,--quiet Disable error reporting by getopt(3)
-Q,--quiet-output No normal output
-s,--shell=shell Set shell quoting conventions
-T,--test Test for getopt(1) version
-u,--unquoted Don't quote the output
getty [OPTIONS] BAUD_RATE TTY [TERMTYPE]
Open a tty, prompt for a login name, then invoke /bin/login
Options:
-h Enable hardware (RTS/CTS) flow control
-i Don't display /etc/issue before running login
-L Local line, don't do carrier detect
-m Get baud rate from modem's CONNECT status message
-w Wait for a CR or LF before sending /etc/issue
-n Don't prompt the user for a login name
-f ISSUE_FILE Display ISSUE_FILE instead of /etc/issue
-l LOGIN Invoke LOGIN instead of /bin/login
-t SEC Terminate after SEC if no username is read
-I INITSTR Send INITSTR before anything else
-H HOST Log HOST into the utmp file as the hostname
grep [-HhnlLoqvsriwFE] [-m N] [-A/B/C N] PATTERN/-e PATTERN.../-f FILE [FILE]...
Search for PATTERN in FILEs (or stdin)
Options:
-H Add 'filename:' prefix
-h Do not add 'filename:' prefix
-n Add 'line_no:' prefix
-l Show only names of files that match
-L Show only names of files that don't match
-c Show only count of matching lines
-o Show only the matching part of line
-q Quiet. Return 0 if PATTERN is found, 1 otherwise
-v Select non-matching lines
-s Suppress open and read errors
-r Recurse
-i Ignore case
-w Match whole words only
-F PATTERN is a literal (not regexp)
-E PATTERN is an extended regexp
-m N Match up to N times per file
-A N Print N lines of trailing context
-B N Print N lines of leading context
-C N Same as '-A N -B N'
-e PTRN Pattern to match
-f FILE Read pattern from file
gunzip [OPTIONS] [FILE]...
Decompress FILEs (or stdin)
Options:
-c Write to stdout
-f Force
-t Test file integrity
gzip [OPTIONS] [FILE]...
Compress FILEs (or stdin)
Options:
-d Decompress
-c Write to stdout
-f Force
halt [-d DELAY] [-n] [-f] [-w]
Halt the system
Options:
-d Delay interval for halting
-n No call to sync()
-f Force halt (don't go through init)
-w Only write a wtmp record
hd FILE...
hd is an alias for hexdump -C
head [OPTIONS] [FILE]...
Print first 10 lines of each FILE (or stdin) to stdout. With more than one FILE, precede each with a filename header.
Options:
-n N[kbm] Print first N lines
-c N[kbm] Print first N bytes
-q Never print headers
-v Always print headers
N may be suffixed by k (x1024), b (x512), or m (x1024^2).
hexdump [-bcCdefnosvxR] [FILE]...
Display FILEs (or stdin) in a user specified format
Options:
-b One-byte octal display
-c One-byte character display
-C Canonical hex+ASCII, 16 bytes per line
-d Two-byte decimal display
-e FORMAT STRING
-f FORMAT FILE
-n LENGTH Interpret only LENGTH bytes of input
-o Two-byte octal display
-s OFFSET Skip OFFSET bytes
-v Display all input data
-x Two-byte hexadecimal display
-R Reverse of 'hexdump -Cv'
hostid
Print out a unique 32-bit identifier for the machine
hostname [OPTIONS] [HOSTNAME | -F FILE]
Get or set hostname or DNS domain name
Options:
-s Short
-i Addresses for the hostname
-d DNS domain name
-f Fully qualified domain name
-F FILE Use FILE's content as hostname
httpd [-ifv[v]] [-c CONFFILE] [-p [IP:]PORT] [-u USER[:GRP]] [-r REALM] [-h HOME] or httpd -d/-e/-m STRING
Listen for incoming HTTP requests
Options:
-i Inetd mode
-f Don't daemonize
-v[v] Verbose
-p [IP:]PORT Bind to ip:port (default *:80)
-u USER[:GRP] Set uid/gid after binding to port
-r REALM Authentication Realm for Basic Authentication
-h HOME Home directory (default .)
-c FILE Configuration file (default {/etc,HOME}/httpd.conf)
-m STRING MD5 crypt STRING
-e STRING HTML encode STRING
-d STRING URL decode STRING
hwclock [-r|--show] [-s|--hctosys] [-w|--systohc] [-l|--localtime] [-u|--utc] [-f FILE]
Query and set hardware clock (RTC)
Options:
-r Show hardware clock time
-s Set system time from hardware clock
-w Set hardware clock to system time
-u Hardware clock is in UTC
-l Hardware clock is in local time
-f FILE Use specified device (e.g. /dev/rtc2)
id [OPTIONS] [USER]
Print information about USER or the current user
Options:
-u Print user ID
-g Print group ID
-G Print supplementary group IDs
-n Print name instead of a number
-r Print real user ID instead of effective ID
ifconfig [-a] interface [address]
Configure a network interface
Options:
[[-]broadcast [ADDRESS]] [[-]pointopoint [ADDRESS]]
[netmask ADDRESS] [dstaddr ADDRESS]
[hw ether ADDRESS] [metric NN] [mtu NN]
[[-]trailers] [[-]arp] [[-]allmulti]
[multicast] [[-]promisc] [txqueuelen NN] [[-]dynamic]
[mem_start NN] [io_addr NN] [irq NN]
[up|down] ...
ifdown [-ainmvf] ifaces...
Options:
-a De/configure all interfaces automatically
-i FILE Use FILE for interface definitions
-n Print out what would happen, but don't do it
(note: doesn't disable mappings)
-m Don't run any mappings
-v Print out what would happen before doing it
-f Force de/configuration
ifup [-ainmvf] IFACE...
Options:
-a De/configure all interfaces automatically
-i FILE Use FILE for interface definitions
-n Print out what would happen, but don't do it
(note: doesn't disable mappings)
-m Don't run any mappings
-v Print out what would happen before doing it
-f Force de/configuration
inetd [-fe] [-q N] [-R N] [CONFFILE]
Listen for network connections and launch programs
Options:
-f Run in foreground
-e Log to stderr
-q N Socket listen queue (default: 128)
-R N Pause services after N connects/min
(default: 0 - disabled)
init
Init is the parent of all processes
insmod [-qfwrsv] MODULE [symbol=value]...
Options:
-r Remove MODULE (stacks) or do autoclean
-q Quiet
-v Verbose
-f Force
-w Wait for unload
-s Report via syslog instead of stderr
install [-cdDsp] [-o USER] [-g GRP] [-m MODE] [SOURCE]... DEST
Copy files and set attributes
Options:
-c Just copy (default)
-d Create directories
-D Create leading target directories
-s Strip symbol table
-p Preserve date
-o USER Set ownership
-g GRP Set group ownership
-m MODE Set permissions
ionice [-c 1-3] [-n 0-7] [-p PID] [PROG]
Change I/O priority and class
Options:
-c Class. 1:realtime 2:best-effort 3:idle
-n Priority
ip [OPTIONS] {address | route | link | tunnel | rule} {COMMAND}
ip [OPTIONS] OBJECT {COMMAND} where OBJECT := {address | route | link | tunnel | rule} OPTIONS := { -f[amily] { inet | inet6 | link } | -o[neline] }
| ipaddr { {add|del} IFADDR dev STRING | {show|flush} | |
| [dev STRING] [to PREFIX] } |
ipaddr {add|delete} IFADDR dev STRING ipaddr {show|flush} [dev STRING] [scope SCOPE-ID] [to PREFIX] [label PATTERN] IFADDR := PREFIX | ADDR peer PREFIX [broadcast ADDR] [anycast ADDR] [label STRING] [scope SCOPE-ID] SCOPE-ID := [host | link | global | NUMBER]
ipcalc [OPTIONS] ADDRESS[[/]NETMASK] [NETMASK]
Calculate IP network settings from a IP address
Options:
-b,--broadcast Display calculated broadcast address
-n,--network Display calculated network address
-m,--netmask Display default netmask for IP
-p,--prefix Display the prefix for IP/NETMASK
-h,--hostname Display first resolved host name
-s,--silent Don't ever display error messages
ipcrm [-MQS key] [-mqs id]
Upper-case options MQS remove an object by shmkey value. Lower-case options remove an object by shmid value.
Options:
-mM Remove memory segment after last detach
-qQ Remove message queue
-sS Remove semaphore
ipcs [[-smq] -i shmid] | [[-asmq] [-tcplu]]
-i Show specific resource
Resource specification:
-m Shared memory segments
-q Message queues
-s Semaphore arrays
-a All (default)
Output format:
-t Time
-c Creator
-p Pid
-l Limits
-u Summary
iplink { set DEVICE { up | down | arp { on | off } | show [DEVICE] }
iplink set DEVICE { up | down | arp | multicast { on | off } | dynamic { on | off } | mtu MTU } iplink show [DEVICE]
| iproute { list | flush | { add | del | change | append | | |
| replace | monitor } ROUTE } |
iproute { list | flush } SELECTOR iproute get ADDRESS [from ADDRESS iif STRING] [oif STRING] [tos TOS] iproute { add | del | change | append | replace | monitor } ROUTE SELECTOR := [root PREFIX] [match PREFIX] [proto RTPROTO] ROUTE := [TYPE] PREFIX [tos TOS] [proto RTPROTO] [metric METRIC]
iprule {[list | add | del] RULE}
| iprule [list | add | del] SELECTOR ACTION | |
| SELECTOR := [from PREFIX] [to PREFIX] [tos TOS] [fwmark FWMARK] | |
| [dev STRING] [pref NUMBER] | |
| ACTION := [table TABLE_ID] [nat ADDRESS] | |
| [prohibit | reject | unreachable] | |
| [realms [SRCREALM/]DSTREALM] | |
| TABLE_ID := [local | main | default | NUMBER] |
| iptunnel { add | change | del | show } [NAME] | |
| [mode { ipip | gre | sit }] | |
| [remote ADDR] [local ADDR] [ttl TTL] |
| iptunnel { add | change | del | show } [NAME] | |
| [mode { ipip | gre | sit }] [remote ADDR] [local ADDR] | |
| [[i|o]seq] [[i|o]key KEY] [[i|o]csum] | |
| [ttl TTL] [tos TOS] [[no]pmtudisc] [dev PHYS_DEV] |
kbd_mode [-a|k|s|u] [-C TTY]
Report or set the keyboard mode
Options:
-a Default (ASCII)
-k Medium-raw (keyboard)
-s Raw (scancode)
-u Unicode (utf-8)
-C TTY Affect TTY instead of /dev/tty
kill [-l] [-SIG] PID...
Send a signal (default: TERM) to given PIDs
Options:
-l List all signal names and numbers
killall [-l] [-q] [-SIG] PROCESS_NAME...
Send a signal (default: TERM) to given processes
Options:
-l List all signal names and numbers
-q Don't complain if no processes were killed
killall5 [-l] [-SIG] [-o PID]...
Send a signal (default: TERM) to all processes outside current session
Options:
-l List all signal names and numbers
-o PID Don't signal this PID
klogd [-c N] [-n]
Kernel logger
Options:
-c N Only messages with level < N are printed to console
-n Run in foreground
last [-HW] [-f FILE]
Show listing of the last users that logged into the system
Options:
-W Display with no host column truncation
-f FILE Read from FILE instead of /var/log/wtmp
length STRING
Print STRING's length
less [-EMNmh~I?] [FILE]...
View FILE (or stdin) one screenful at a time
Options:
-E Quit once the end of a file is reached
-M,-m Display status line with line numbers
and percentage through the file
-N Prefix line number to each line
-I Ignore case in all searches
-~ Suppress ~s displayed past the end of the file
ln [OPTIONS] TARGET... LINK|DIR
Create a link LINK or DIR/TARGET to the specified TARGET(s)
Options:
-s Make symlinks instead of hardlinks
-f Remove existing destinations
-n Don't dereference symlinks - treat like normal file
-b Make a backup of the target (if exists) before link operation
-S suf Use suffix instead of ~ when making backup files
loadfont < font
Load a console font from stdin
loadkmap < keymap
Load a binary keyboard translation table from stdin
logger [OPTIONS] [MESSAGE]
Write MESSAGE (or stdin) to syslog
Options:
-s Log to stderr as well as the system log
-t TAG Log using the specified tag (defaults to user name)
-p PRIO Priority (numeric or facility.level pair)
login [-p] [-h HOST] [[-f] USER]
Begin a new session on the system
Options:
-f Don't authenticate (user already authenticated)
-h Name of the remote host
-p Preserve environment
logname
Print the name of the current user
logread [OPTIONS]
Show messages in syslogd's circular buffer
Options:
-f Output data as log grows
| losetup [-o OFS] LOOPDEV FILE - associate loop devices | |
| losetup -d LOOPDEV - disassociate | |
| losetup [-f] - show |
Options:
-o OFS Start OFS bytes into FILE
-f Show first free loop device
ls [-1AacCdeFilnpLRrSsTtuvwxXhk] [FILE]...
List directory contents
Options:
-1 List in a single column
-A Don't list . and ..
-a Don't hide entries starting with .
-C List by columns
-c With -l: sort by ctime
--color[={always,never,auto}] Control coloring
-d List directory entries instead of contents
-e List full date and time
-F Append indicator (one of */=@|) to entries
-i List inode numbers
-l Long listing format
-n List numeric UIDs and GIDs instead of names
-p Append indicator (one of /=@|) to entries
-L List entries pointed to by symlinks
-R Recurse
-r Sort in reverse order
-S Sort by file size
-s List the size of each file, in blocks
-T N Assume tabstop every N columns
-t With -l: sort by modification time
-u With -l: sort by access time
-v Sort by version
-w N Assume the terminal is N columns wide
-x List by lines
-X Sort by extension
-h List sizes in human readable format (1K 243M 2G)
lsattr [-Radlv] [FILE]...
List file attributes on an ext2 fs
Options:
-R Recurse
-a Don't hide entries starting with .
-d List directory entries instead of contents
-l List long flag names
-v List the file's version/generation number
lsmod [-qfwrsv] MODULE [symbol=value]...
Options:
-r Remove MODULE (stacks) or do autoclean
-q Quiet
-v Verbose
-f Force
-w Wait for unload
-s Report via syslog instead of stderr
lzcat FILE
Decompress to stdout
lzma -d [OPTIONS] [FILE]...
Decompress FILE (or stdin)
Options:
-d Decompress
-c Write to stdout
-f Force
lzop [-cfvd123456789CF] [FILE]...
Options:
-1..9 Compression level
-d Decompress
-c Write to stdout
-f Force
-v Verbose
-F Don't store or verify checksum
-C Also write checksum of compressed block
lzopcat [-vCF] [FILE]...
-v Verbose
-F Don't store or verify checksum
md5sum [OPTIONS] [FILE]... or: md5sum [OPTIONS] -c [FILE]
Print or check MD5 checksums
Options:
-c Check sums against given list
-s Don't output anything, status code shows success
-w Warn about improperly formatted checksum lines
mdev [-s]
-s Scan /sys and populate /dev during system boot
It can be run by kernel as a hotplug helper. To activate it: echo /sbin/mdev > /proc/sys/kernel/hotplug It uses /etc/mdev.conf with lines [-]DEVNAME UID:GID PERM [>|=PATH] [@|$|*PROG]
mesg [y|n]
| Control write access to your terminal | ||
| y | Allow write access to your terminal | |
| n | Disallow write access to your terminal |
microcom [-d DELAY] [-t TIMEOUT] [-s SPEED] [-X] TTY
Copy bytes for stdin to TTY and from TTY to stdout
Options:
-d Wait up to DELAY ms for TTY output before sending every
next byte to it
-t Exit if both stdin and TTY are silent for TIMEOUT ms
-s Set serial line to SPEED
-X Disable special meaning of NUL and Ctrl-X from stdin
mkdir [OPTIONS] DIRECTORY...
Create DIRECTORY
Options:
-m Mode
-p No error if exists; make parent directories as needed
mkdosfs [-v] [-n LABEL] BLOCKDEV [KBYTES]
Make a FAT32 filesystem
Options:
-v Verbose
-n LBL Volume label
mke2fs [-Fn] [-b BLK_SIZE] [-i INODE_RATIO] [-I INODE_SIZE] [-m RESERVED_PERCENT] [-L LABEL] BLOCKDEV [KBYTES]
-b BLK_SIZE Block size, bytes
-F Force
-i RATIO Max number of files is filesystem_size / RATIO
-I BYTES Inode size (min 128)
-L LBL Volume label
-m PERCENT Percent of blocks to reserve for admin
-n Dry run
mkfifo [OPTIONS] name
Create named pipe (identical to 'mknod name p')
Options:
-m MODE Mode (default a=rw)
mkfs.ext2 [-Fn] [-b BLK_SIZE] [-i INODE_RATIO] [-I INODE_SIZE] [-m RESERVED_PERCENT] [-L LABEL] BLOCKDEV [KBYTES]
-b BLK_SIZE Block size, bytes
-F Force
-i RATIO Max number of files is filesystem_size / RATIO
-I BYTES Inode size (min 128)
-L LBL Volume label
-m PERCENT Percent of blocks to reserve for admin
-n Dry run
mkfs.vfat [-v] [-n LABEL] BLOCKDEV [KBYTES]
Make a FAT32 filesystem
Options:
-v Verbose
-n LBL Volume label
mknod [OPTIONS] NAME TYPE MAJOR MINOR
Create a special file (block, character, or pipe)
Options:
-m Create the special file using the specified mode (default a=rw)
TYPEs include:
b: Make a block device
c or u: Make a character device
p: Make a named pipe (MAJOR and MINOR are ignored)
mkswap [OPTIONS] BLOCKDEV [KBYTES]
Prepare BLOCKDEV to be used as swap partition
Options:
-L LBL Label
mktemp [-dt] [-p DIR] [TEMPLATE]
Create a temporary file with name based on TEMPLATE and print its name. TEMPLATE must end with XXXXXX (e.g. [/dir/]nameXXXXXX).
Options:
-d Make a directory instead of a file
-t Generate a path rooted in temporary directory
-p DIR Use DIR as a temporary directory (implies -t)
For -t or -p, directory is chosen as follows: $TMPDIR if set, else -p DIR, else /tmp
modinfo [-adlp0] [-F keyword] MODULE
Options:
-a Shortcut for '-F author'
-d Shortcut for '-F description'
-l Shortcut for '-F license'
-p Shortcut for '-F parm'
-F keyword Keyword to look for
-0 Separate output with NULs
modprobe [-qfwrsv] MODULE [symbol=value]...
Options:
-r Remove MODULE (stacks) or do autoclean
-q Quiet
-v Verbose
-f Force
-w Wait for unload
-s Report via syslog instead of stderr
more [FILE]...
View FILE (or stdin) one screenful at a time
mount [OPTIONS] [-o OPTS] DEVICE NODE
Mount a filesystem. Filesystem autodetection requires /proc.
Options:
-a Mount all filesystems in fstab
-f Dry run
-r Read-only mount
-w Read-write mount (default)
-t FSTYPE Filesystem type
-O OPT Mount only filesystems with option OPT (-a only)
-o OPT:
loop Ignored (loop devices are autodetected)
[a]sync Writes are [a]synchronous
[no]atime Disable/enable updates to inode access times
[no]diratime Disable/enable atime updates to directories
[no]relatime Disable/enable atime updates relative to modification time
[no]dev (Dis)allow use of special device files
[no]exec (Dis)allow use of executable files
[no]suid (Dis)allow set-user-id-root programs
[r]shared Convert [recursively] to a shared subtree
[r]slave Convert [recursively] to a slave subtree
[r]private Convert [recursively] to a private subtree
[un]bindable Make mount point [un]able to be bind mounted
bind Bind a file or directory to another location
move Relocate an existing mount point
remount Remount a mounted filesystem, changing flags
ro/rw Same as -r/-w
There are filesystem-specific -o flags.
mountpoint [-q] <[-dn] DIR | -x DEVICE>
Check if the directory is a mountpoint
Options:
-q Quiet
-d Print major/minor device number of the filesystem
-n Print device name of the filesystem
-x Print major/minor device number of the blockdevice
mv [OPTIONS] SOURCE DEST or: mv [OPTIONS] SOURCE... DIRECTORY
Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY
Options:
-f Don't prompt before overwriting
-i Interactive, prompt before overwrite
nameif [-s] [-c FILE] [{IFNAME MACADDR}]
Rename network interface while it in the down state
Options:
-c FILE Use configuration file (default: /etc/mactab)
-s Use syslog (LOCAL0 facility)
IFNAME MACADDR new_interface_name interface_mac_address
netstat [-laentuwxrWp]
Display networking information
Options:
-l Display listening server sockets
-a Display all sockets (default: connected)
-e Display other/more information
-n Don't resolve names
-t Tcp sockets
-u Udp sockets
-w Raw sockets
-x Unix sockets
-r Display routing table
-W Display with no column truncation
-p Display PID/Program name for sockets
nice [-n ADJUST] [PROG ARGS]
Change scheduling priority, run PROG
Options:
-n ADJUST Adjust priority by ADJUST
nmeter format_string
Monitor system in real time
Format specifiers:
%Nc or %[cN] Monitor CPU. N - bar size, default 10
(displays: S:system U:user N:niced D:iowait I:irq i:softirq)
%[niface] Monitor network interface 'iface'
%m Monitor allocated memory
%[mf] Monitor free memory
%[mt] Monitor total memory
%s Monitor allocated swap
%f Monitor number of used file descriptors
%Ni Monitor total/specific IRQ rate
%x Monitor context switch rate
%p Monitor forks
%[pn] Monitor # of processes
%b Monitor block io
%Nt Show time (with N decimal points)
%Nd Milliseconds between updates (default:1000)
%r Print <cr> instead of <lf> at EOL
nohup PROG ARGS
Run PROG immune to hangups, with output to a non-tty
nslookup [HOST] [SERVER]
Query the nameserver for the IP address of the given HOST optionally using a specified DNS server
ntpd [-dnqwl] [-S PROG] [-p PEER]...
NTP client/server
Options:
-d Verbose
-n Do not daemonize
-q Quit after clock is set
-w Do not set time (only query peers), implies -n
-l Run as server on port 123
-S PROG Run PROG after stepping time, stratum change, and every 11 mins
-p PEER Obtain time from PEER (may be repeated)
od [-aBbcDdeFfHhIiLlOovXx] [FILE]
Write an unambiguous representation, octal bytes by default, of FILE (or stdin) to stdout
openvt [-c N] [-sw] [PROG ARGS]
Start PROG on a new virtual terminal
Options:
-c N Use specified VT
-s Switch to the VT
-w Wait for PROG to exit
passwd [OPTIONS] [USER]
Change USER's password. If no USER is specified, changes the password for the current user.
Options:
-a Algorithm to use for password (des, md5)
-d Delete password for the account
-l Lock (disable) account
-u Unlock (re-enable) account
patch [OPTIONS] [ORIGFILE [PATCHFILE]]
-p,--strip N Strip N leading components from file names
-i,--input DIFF Read DIFF instead of stdin
-R,--reverse Reverse patch
-N,--forward Ignore already applied patches
--dry-run Don't actually change files
pgrep [-flnovx] [-s SID|-P PPID|PATTERN]
Display process(es) selected by regex PATTERN
Options:
-l Show command name too
-f Match against entire command line
-n Show the newest process only
-o Show the oldest process only
-v Negate the match
-x Match whole name (not substring)
-s Match session ID (0 for current)
-P Match parent process ID
pidof [OPTIONS] [NAME]...
List PIDs of all processes with names that match NAMEs
Options:
-s Show only one PID
-o PID Omit given pid
Use %PPID to omit pid of pidof's parent
ping [OPTIONS] HOST
Send ICMP ECHO_REQUEST packets to network hosts
Options:
-4, -6 Force IP or IPv6 name resolution
-c CNT Send only CNT pings
-s SIZE Send SIZE data bytes in packets (default:56)
-I IFACE/IP Use interface or IP address as source
-W SEC Seconds to wait for the first response (default:10)
(after all -c CNT packets are sent)
-w SEC Seconds until ping exits (default:infinite)
(can exit earlier with -c CNT)
-q Quiet, only displays output at start
and when finished
pivot_root NEW_ROOT PUT_OLD
Move the current root file system to PUT_OLD and make NEW_ROOT the new root file system
pkill [-l|-SIGNAL] [-fnovx] [-s SID|-P PPID|PATTERN]
Send a signal to process(es) selected by regex PATTERN
Options:
-l List all signals
-f Match against entire command line
-n Signal the newest process only
-o Signal the oldest process only
-v Negate the match
-x Match whole name (not substring)
-s Match session ID (0 for current)
-P Match parent process ID
poweroff [-d DELAY] [-n] [-f]
Halt and shut off power
Options:
-d Delay interval for halting
-n Do not sync
-f Force power off (don't go through init)
printenv [VARIABLE]...
Print environment VARIABLEs. If no VARIABLE specified, print all.
printf FORMAT [ARGUMENT]...
Format and print ARGUMENT(s) according to FORMAT, where FORMAT controls the output exactly as in C printf
ps
Show list of processes
Options:
w Wide output
pscan [-cb] [-p MIN_PORT] [-P MAX_PORT] [-t TIMEOUT] [-T MIN_RTT] HOST
Scan a host, print all open ports
Options:
-c Show closed ports too
-b Show blocked ports too
-p Scan from this port (default 1)
-P Scan up to this port (default 1024)
-t Timeout (default 5000 ms)
-T Minimum rtt (default 5 ms, increase for congested hosts)
pwd
Print the full filename of the current working directory
rdate [-sp] HOST
Get and possibly set the system date and time from a remote HOST
Options:
-s Set the system date and time (default)
-p Print the date and time
rdev
Print the device node associated with the filesystem mounted at '/'
readahead [FILE]...
Preload FILEs to RAM
readlink [-fnv] FILE
Display the value of a symlink
Options:
-f Canonicalize by following all symlinks
-n Don't add newline
-v Verbose
readprofile [OPTIONS]
Options:
-m mapfile (Default: /boot/System.map)
-p profile (Default: /proc/profile)
-M NUM Set the profiling multiplier to NUM
-i Print only info about the sampling step
-v Verbose
-a Print all symbols, even if count is 0
-b Print individual histogram-bin counts
-s Print individual counters within functions
-r Reset all the counters (root only)
-n Disable byte order auto-detection
realpath FILE...
Return the absolute pathnames of given FILE
reboot [-d DELAY] [-n] [-f]
Reboot the system
Options:
-d Delay interval for rebooting
-n No call to sync()
-f Force reboot (don't go through init)
renice {{-n INCREMENT} | PRIORITY} [[-p | -g | -u] ID...]
Change scheduling priority for a running process
Options:
-n Adjust current nice value (smaller is faster)
-p Process id(s) (default)
-g Process group id(s)
-u Process user name(s) and/or id(s)
reset
Reset the screen
resize
Resize the screen
rfkill COMMAND [INDEX|TYPE]
Enable/disable wireless devices
Commands:
list [INDEX|TYPE] List current state
block INDEX|TYPE Disable device
unblock INDEX|TYPE Enable device
TYPE: all, wlan(wifi), bluetooth, uwb(ultrawideband),
wimax, wwan, gps, fm
rm [OPTIONS] FILE...
Remove (unlink) FILEs
Options:
-i Always prompt before removing
-f Never prompt
-R,-r Recurse
rmdir [OPTIONS] DIRECTORY...
Remove DIRECTORY if it is empty
Options:
-p|--parents Include parents
--ignore-fail-on-non-empty
rmmod [-qfwrsv] MODULE [symbol=value]...
Options:
-r Remove MODULE (stacks) or do autoclean
-q Quiet
-v Verbose
-f Force
-w Wait for unload
-s Report via syslog instead of stderr
route [{add|del|delete}]
Edit kernel routing tables
Options:
-n Don't resolve names
-e Display other/more information
-A inet Select address family
rtcwake [-a | -l | -u] [-d DEV] [-m MODE] [-s SEC | -t TIME]
Enter a system sleep state until specified wakeup time
-a,--auto Read clock mode from adjtime
-l,--local Clock is set to local time
-u,--utc Clock is set to UTC time
-d,--device=DEV Specify the RTC device
-m,--mode=MODE Set the sleep state (default: standby)
-s,--seconds=SEC Set the timeout in SEC seconds from now
-t,--time=TIME Set the timeout to TIME seconds from epoch
run-parts [-t] [-l] [-a ARG] [-u MASK] DIRECTORY
Run a bunch of scripts in DIRECTORY
Options:
-t Print what would be run, but don't actually run anything
-a ARG Pass ARG as argument for every program
-u MASK Set the umask to MASK before running every program
-l Print names of all matching files even if they are not executable
runlevel [FILE]
Find the current and previous system runlevel
If no utmp FILE exists or if no runlevel record can be found, print "unknown"
rx FILE
Receive a file using the xmodem protocol
script [-afqt] [-c PROG] [OUTFILE]
Options:
-a Append output
-c PROG Run PROG, not shell
-f Flush output after each write
-q Quiet
-t Send timing to stderr
scriptreplay timingfile [typescript [divisor]]
Play back typescripts, using timing information
sed [-efinr] SED_CMD [FILE]...
Options:
-e CMD Add CMD to sed commands to be executed
-f FILE Add FILE contents to sed commands to be executed
-i Edit files in-place (else sends result to stdout)
-n Suppress automatic printing of pattern space
-r Use extended regex syntax
If no -e or -f, the first non-option argument is the sed command string. Remaining arguments are input files (stdin if none).
seq [-w] [-s SEP] [FIRST [INC]] LAST
Print numbers from FIRST to LAST, in steps of INC. FIRST, INC default to 1.
Options:
-w Pad to last with leading zeros
-s SEP String separator
setconsole [-r|--reset] [DEVICE]
Redirect system console output to DEVICE (default: /dev/tty)
Options:
-r Reset output to /dev/console
setfont FONT [-m MAPFILE] [-C TTY]
Load a console font
Options:
-m MAPFILE Load console screen map
-C TTY Affect TTY instead of /dev/tty
setkeycodes SCANCODE KEYCODE...
Set entries into the kernel's scancode-to-keycode map, allowing unusual keyboards to generate usable keycodes.
SCANCODE may be either xx or e0xx (hexadecimal), and KEYCODE is given in decimal.
setlogcons N
Redirect the kernel output to console N (0 for current)
setsid PROG ARGS
Run PROG in a new session. PROG will have no controlling terminal
and will not be affected by keyboard signals (Ctrl-C etc).
See setsid(2) for details.
sha1sum [OPTIONS] [FILE]... or: sha1sum [OPTIONS] -c [FILE]
Print or check SHA1 checksums
Options:
-c Check sums against given list
-s Don't output anything, status code shows success
-w Warn about improperly formatted checksum lines
sha256sum [OPTIONS] [FILE]... or: sha256sum [OPTIONS] -c [FILE]
Print or check SHA256 checksums
Options:
-c Check sums against given list
-s Don't output anything, status code shows success
-w Warn about improperly formatted checksum lines
sha512sum [OPTIONS] [FILE]... or: sha512sum [OPTIONS] -c [FILE]
Print or check SHA512 checksums
Options:
-c Check sums against given list
-s Don't output anything, status code shows success
-w Warn about improperly formatted checksum lines
showkey [-a | -k | -s]
Show keys pressed
Options:
-a Display decimal/octal/hex values of the keys
-k Display interpreted keycodes (default)
-s Display raw scan-codes
sleep [N]...
Pause for a time equal to the total of the args given, where each arg can have an optional suffix of (s)econds, (m)inutes, (h)ours, or (d)ays
smemcap >SMEMDATA.TAR
Collect memory usage data in /proc and write it to stdout
sort [-nrugMcszbdfimSTokt] [-o FILE] [-k start[.offset][opts][,end[.offset][opts]] [-t CHAR] [FILE]...
Sort lines of text
Options:
-b Ignore leading blanks
-c Check whether input is sorted
-d Dictionary order (blank or alphanumeric only)
-f Ignore case
-g General numerical sort
-i Ignore unprintable characters
-k Sort key
-M Sort month
-n Sort numbers
-o Output to file
-k Sort by key
-t CHAR Key separator
-r Reverse sort order
-s Stable (don't sort ties alphabetically)
-u Suppress duplicate lines
-z Lines are terminated by NUL, not newline
-mST Ignored for GNU compatibility
split [OPTIONS] [INPUT [PREFIX]]
Options:
-b n[k|m] Split by bytes
-l n Split by lines
-a n Use n letters as suffix
start-stop-daemon [OPTIONS] [-S|-K] ... [-- ARGS...]
Search for matching processes, and then -K: stop all matching processes. -S: start a process unless a matching process is found.
Process matching:
-u,--user USERNAME|UID Match only this user's processes
-n,--name NAME Match processes with NAME
in comm field in /proc/PID/stat
-x,--exec EXECUTABLE Match processes with this command
in /proc/PID/cmdline
-p,--pidfile FILE Match a process with PID from the file
All specified conditions must match
-S only:
-x,--exec EXECUTABLE Program to run
-a,--startas NAME Zeroth argument
-b,--background Background
-N,--nicelevel N Change nice level
-c,--chuid USER[:[GRP]] Change to user/group
-m,--make-pidfile Write PID to the pidfile specified by -p
-K only:
-s,--signal SIG Signal to send
-t,--test Match only, exit with 0 if a process is found
Other:
-o,--oknodo Exit with status 0 if nothing is done
-v,--verbose Verbose
-q,--quiet Quiet
stat [OPTIONS] FILE...
Display file (default) or filesystem status
Options:
-c fmt Use the specified format
-f Display filesystem status
-L Follow links
-t Display info in terse form
Valid format sequences for files:
%a Access rights in octal %A Access rights in human readable form %b Number of blocks allocated (see %B) %B The size in bytes of each block reported by %b %d Device number in decimal %D Device number in hex %f Raw mode in hex %F File type %g Group ID of owner %G Group name of owner %h Number of hard links %i Inode number %n File name %N File name, with -> TARGET if symlink %o I/O block size %s Total size, in bytes %t Major device type in hex %T Minor device type in hex %u User ID of owner %U User name of owner %x Time of last access %X Time of last access as seconds since Epoch %y Time of last modification %Y Time of last modification as seconds since Epoch %z Time of last change %Z Time of last change as seconds since Epoch
Valid format sequences for file systems:
%a Free blocks available to non-superuser %b Total data blocks in file system %c Total file nodes in file system %d Free file nodes in file system %f Free blocks in file system %i File System ID in hex %l Maximum length of filenames %n File name %s Block size (for faster transfer) %S Fundamental block size (for block counts) %t Type in hex %T Type in human readable form
strings [-afo] [-n LEN] [FILE]...
Display printable strings in a binary file
Options:
-a Scan whole file (default)
-f Precede strings with filenames
-n LEN At least LEN characters form a string (default 4)
-o Precede strings with decimal offsets
stty [-a|g] [-F DEVICE] [SETTING]...
Without arguments, prints baud rate, line discipline, and deviations from stty sane
Options:
-F DEVICE Open device instead of stdin
-a Print all current settings in human-readable form
-g Print in stty-readable form
[SETTING] See manpage
su [OPTIONS] [-] [USERNAME]
Change user id or become root
Options:
-p,-m Preserve environment
-c CMD Command to pass to 'sh -c'
-s SH Shell to use instead of default shell
sulogin [-t N] [TTY]
Single user login
Options:
-t N Timeout
sum [-rs] [FILE]...
Checksum and count the blocks in a file
Options:
-r Use BSD sum algorithm (1K blocks)
-s Use System V sum algorithm (512byte blocks)
swapoff [-a] [DEVICE]
Stop swapping on DEVICE
Options:
-a Stop swapping on all swap devices
swapon [-a] [-p PRI] [DEVICE]
Start swapping on DEVICE
Options:
-a Start swapping on all swap devices
-p PRI Set swap device priority
switch_root [-c /dev/console] NEW_ROOT NEW_INIT [ARGS]
Free initramfs and switch to another root fs:
chroot to NEW_ROOT, delete all in /, move NEW_ROOT to /, execute NEW_INIT. PID must be 1. NEW_ROOT must be a mountpoint.
Options:
-c DEV Reopen stdio to DEV after switch
sync
Write all buffered blocks to disk
sysctl [OPTIONS] [VALUE]...
Configure kernel parameters at runtime
Options:
-n Don't print key names
-e Don't warn about unknown keys
-w Change sysctl setting
-p FILE Load sysctl settings from FILE (default /etc/sysctl.conf)
-a Display all values
-A Display all values in table form
syslogd [OPTIONS]
System logging utility. This version of syslogd ignores /etc/syslog.conf
Options:
-n Run in foreground
-O FILE Log to given file (default:/var/log/messages)
-l N Set local log level
-S Smaller logging output
-s SIZE Max size (KB) before rotate (default:200KB, 0=off)
-b N N rotated logs to keep (default:1, max=99, 0=purge)
-R HOST[:PORT] Log to IP or hostname on PORT (default PORT=514/UDP)
-L Log locally and via network (default is network only if -R)
-D Drop duplicates
-C[size(KiB)] Log to shared mem buffer (read it using logread)
tac [FILE]...
Concatenate FILEs and print them in reverse
tail [OPTIONS] [FILE]...
Print last 10 lines of each FILE (or stdin) to stdout. With more than one FILE, precede each with a filename header.
Options:
-f Print data as file grows
-s SECONDS Wait SECONDS between reads with -f
-n N[kbm] Print last N lines
-c N[kbm] Print last N bytes
-q Never print headers
-v Always print headers
N may be suffixed by k (x1024), b (x512), or m (x1024^2). If N starts with a '+', output begins with the Nth item from the start of each file, not from the end.
tar -[cxtzjaZmvO] [-X FILE] [-f TARFILE] [-C DIR] [FILE]...
Create, extract, or list files from a tar file
Operation:
c Create
x Extract
t List
Options:
f Name of TARFILE ('-' for stdin/out)
C Change to DIR before operation
v Verbose
z (De)compress using gzip
j (De)compress using bzip2
a (De)compress using lzma
Z (De)compress using compress
O Extract to stdout
h Follow symlinks
m Don't restore mtime
exclude File to exclude
X File with names to exclude
T File with names to include
tcpsvd [-hEv] [-c N] [-C N[:MSG]] [-b N] [-u USER] [-l NAME] IP PORT PROG
Create TCP socket, bind to IP:PORT and listen for incoming connection. Run PROG for each connection.
IP IP to listen on. '0' = all
PORT Port to listen on
PROG ARGS Program to run
-l NAME Local hostname (else looks up local hostname in DNS)
-u USER[:GRP] Change to user/group after bind
-c N Handle up to N connections simultaneously
-b N Allow a backlog of approximately N TCP SYNs
-C N[:MSG] Allow only up to N connections from the same IP
New connections from this IP address are closed
immediately. MSG is written to the peer before close
-h Look up peer's hostname
-E Don't set up environment variables
-v Verbose
tee [OPTIONS] [FILE]...
Copy stdin to each FILE, and also to stdout
Options:
-a Append to the given FILEs, don't overwrite
-i Ignore interrupt signals (SIGINT)
telnet [-a] [-l USER] HOST [PORT]
Connect to telnet server
Options:
-a Automatic login with $USER variable
-l USER Automatic login as USER
telnetd [OPTIONS]
Handle incoming telnet connections
Options:
-l LOGIN Exec LOGIN on connect
-f ISSUE_FILE Display ISSUE_FILE instead of /etc/issue
-K Close connection as soon as login exits
(normally wait until all programs close slave pty)
-p PORT Port to listen on
-b ADDR[:PORT] Address to bind to
-F Run in foreground
-i Inetd mode
-w SEC Inetd 'wait' mode, linger time SEC
-S Log to syslog (implied by -i or without -F and -w)
test EXPRESSION ]
Check file types, compare values etc. Return a 0/1 exit code depending on logical value of EXPRESSION
tftp [OPTIONS] HOST [PORT]
Transfer a file from/to tftp server
Options:
-l FILE Local FILE
-r FILE Remote FILE
-g Get file
-p Put file
-b SIZE Transfer blocks of SIZE octets
tftpd [-cr] [-u USER] [DIR]
Transfer a file on tftp client's request
tftpd should be used as an inetd service. tftpd's line for inetd.conf: 69 dgram udp nowait root tftpd tftpd /files/to/serve It also can be ran from udpsvd:
udpsvd -vE 0.0.0.0 69 tftpd /files/to/serve
Options:
-r Prohibit upload
-c Allow file creation via upload
-u Access files as USER
time [OPTIONS] PROG ARGS
Run PROG, display resource usage when it exits
Options:
-v Verbose
timeout [-t SECS] [-s SIG] PROG ARGS
Runs PROG. Sends SIG to it if it is not gone in SECS seconds. Defaults: SECS: 10, SIG: TERM.
top [-b] [-nCOUNT] [-dSECONDS] [-m]
Provide a view of process activity in real time. Read the status of all processes from /proc each SECONDS and display a screenful of them.
touch [-c] [-d DATE] FILE [FILE]...
Update the last-modified date on the given FILE[s]
Options:
-c Don't create files
-d DT Date/time to use
tr [-cds] STRING1 [STRING2]
Translate, squeeze, or delete characters from stdin, writing to stdout
Options:
-c Take complement of STRING1
-d Delete input characters coded STRING1
-s Squeeze multiple output characters of STRING2 into one character
| traceroute [-FIldnrv] [-f 1ST_TTL] [-m MAXTTL] [-p PORT] [-q PROBES] | |
| [-s SRC_IP] [-t TOS] [-w WAIT_SEC] [-g GATEWAY] [-i IFACE] | |
| [-z PAUSE_MSEC] HOST [BYTES] |
Trace the route to HOST
Options:
-F Set the don't fragment bit
-I Use ICMP ECHO instead of UDP datagrams
-l Display the TTL value of the returned packet
-d Set SO_DEBUG options to socket
-n Print numeric addresses
-r Bypass routing tables, send directly to HOST
-v Verbose
-m Max time-to-live (max number of hops)
-p Base UDP port number used in probes
(default 33434)
-q Number of probes per TTL (default 3)
-s IP address to use as the source address
-t Type-of-service in probe packets (default 0)
-w Time in seconds to wait for a response (default 3)
-g Loose source route gateway (8 max)
true
Return an exit code of TRUE (0)
tty
Print file name of stdin's terminal
Options:
-s Print nothing, only return exit status
ttysize [w] [h]
Print dimension(s) of stdin's terminal, on error return 80x25
tune2fs [-L LABEL] BLOCKDEV
Adjust filesystem options on ext[23] filesystems
ubiattach -m MTD_NUM [-d UBI_NUM] UBI_CTRL_DEV
Attach MTD device to UBI
Options:
-m MTD_NUM MTD device number to attach
-d UBI_NUM UBI device number to assign
ubidetach -d UBI_NUM UBI_CTRL_DEV
Detach MTD device from UBI
Options:
-d UBI_NUM UBI device number
| udhcpc [-fbnqvoCR] [-i IFACE] [-r IP] [-s PROG] [-p PIDFILE] | |
| [-H HOSTNAME] [-c CID] [-V VENDOR] [-O DHCP_OPT]... [-P N] |
-i,--interface IFACE Interface to use (default eth0)
-p,--pidfile FILE Create pidfile
-r,--request IP IP address to request
-s,--script PROG Run PROG at DHCP events (default /usr/share/udhcpc/default.script)
-t,--retries N Send up to N discover packets
-T,--timeout N Pause between packets (default 3 seconds)
-A,--tryagain N Wait N seconds after failure (default 20)
-f,--foreground Run in foreground
-b,--background Background if lease is not obtained
-S,--syslog Log to syslog too
-n,--now Exit if lease is not obtained
-q,--quit Exit after obtaining lease
-R,--release Release IP on exit
-P,--client-port N Use port N (default 68)
-a,--arping Use arping to validate offered address
-O,--request-option OPT Request DHCP option OPT (cumulative)
-o,--no-default-options Don't request any options (unless -O is given)
-x OPT:VAL Include option OPT in sent packets (cumulative)
-F,--fqdn NAME Ask server to update DNS mapping for NAME
-H,-h,--hostname NAME Send NAME as client hostname (default none)
-V,--vendorclass VENDOR Vendor identifier (default 'udhcp VERSION')
-c,--clientid CLIENTID Client identifier (default own MAC)
-C,--clientid-none Don't send client identifier
udhcpd [-fS] [-P N] [configfile]
DHCP server
-f Run in foreground
-S Log to syslog too
-P N Use port N (default 67)
udpsvd [-hEv] [-c N] [-u USER] [-l NAME] IP PORT PROG
Create UDP socket, bind to IP:PORT and wait for incoming packets. Run PROG for each packet, redirecting all further packets with same peer ip:port to it.
IP IP to listen on. '0' = all
PORT Port to listen on
PROG ARGS Program to run
-l NAME Local hostname (else looks up local hostname in DNS)
-u USER[:GRP] Change to user/group after bind
-c N Handle up to N connections simultaneously
-h Look up peer's hostname
-E Don't set up environment variables
-v Verbose
umount [OPTIONS] FILESYSTEM|DIRECTORY
Unmount file systems
Options:
-a Unmount all file systems
-r Try to remount devices as read-only if mount is busy
-l Lazy umount (detach filesystem)
-f Force umount (i.e., unreachable NFS server)
-d Free loop device if it has been used
uname [-amnrspv]
Print system information
Options:
-a Print all
-m The machine (hardware) type
-n Hostname
-r OS release
-s OS name (default)
-p Processor type
-v OS version
unexpand [-fa][-t N] [FILE]...
Convert spaces to tabs, writing to stdout
Options:
-a,--all Convert all blanks
-f,--first-only Convert only leading blanks
-t,--tabs=N Tabstops every N chars
uniq [-cdu][-f,s,w N] [INPUT [OUTPUT]]
Discard duplicate lines
Options:
-c Prefix lines by the number of occurrences
-d Only print duplicate lines
-u Only print unique lines
-f N Skip first N fields
-s N Skip first N chars (after any skipped fields)
-w N Compare N characters in line
unix2dos [OPTIONS] [FILE]
Convert FILE in-place from Unix to DOS format. When no file is given, use stdin/stdout.
Options:
-u dos2unix
-d unix2dos
unlzma [OPTIONS] [FILE]...
Decompress FILE (or stdin)
Options:
-c Write to stdout
-f Force
unlzop [-cfvCF] [FILE]...
Options:
-c Write to stdout
-f Force
-v Verbose
-F Don't store or verify checksum
unxz [OPTIONS] [FILE]...
Decompress FILE (or stdin)
Options:
-c Write to stdout
-f Force
unzip [-opts[modifiers]] FILE[.zip] [LIST] [-x XLIST] [-d DIR]
Extract files from ZIP archives
Options:
-l List archive contents (with -q for short form)
-n Never overwrite files (default)
-o Overwrite
-p Send output to stdout
-q Quiet
-x XLST Exclude these files
-d DIR Extract files into DIR
uptime
Display the time since the last boot
usleep N
Pause for N microseconds
uudecode [-o OUTFILE] [INFILE]
Uudecode a file Finds outfile name in uuencoded source unless -o is given
uuencode [-m] [INFILE] STORED_FILENAME
Uuencode a file to stdout
Options:
-m Use base64 encoding per RFC1521
vconfig COMMAND [OPTIONS]
Create and remove virtual ethernet devices
Options:
add [interface-name] [vlan_id]
rem [vlan-name]
set_flag [interface-name] [flag-num] [0 | 1]
set_egress_map [vlan-name] [skb_priority] [vlan_qos]
set_ingress_map [vlan-name] [skb_priority] [vlan_qos]
set_name_type [name-type]
vi [OPTIONS] [FILE]...
Edit FILE
Options:
-c Initial command to run ($EXINIT also available)
-R Read-only
-H Short help regarding available features
vlock [OPTIONS]
Lock a virtual terminal. A password is required to unlock.
Options:
-a Lock all VTs
watch [-n SEC] [-t] PROG ARGS
Run PROG periodically
Options:
-n Loop period in seconds (default 2)
-t Don't print header
wc [OPTIONS] [FILE]...
Print line, word, and byte counts for each FILE (or stdin), and a total line if more than one FILE is specified
Options:
-c Print the byte counts
-l Print the newline counts
-L Print the length of the longest line
-w Print the word counts
| wget [-c|--continue] [-s|--spider] [-q|--quiet] [-O|--output-document FILE] | |
| [--header 'header: value'] [-Y|--proxy on/off] [-P DIR] | |
| [--no-check-certificate] [-U|--user-agent AGENT] URL |
Retrieve files via HTTP or FTP
Options:
-s Spider mode - only check file existence
-c Continue retrieval of aborted transfer
-q Quiet
-P Set directory prefix to DIR
-O FILE Save to FILE ('-' for stdout)
-U STR Use STR for User-Agent header
-Y Use proxy ('on' or 'off')
which [COMMAND]...
Locate a COMMAND
who [-a]
Show who is logged on
Options:
-a Show all
whoami
Print the user name associated with the current effective user id
xargs [OPTIONS] [PROG ARGS]
Run PROG on every item given by stdin
Options:
-p Ask user whether to run each command
-r Don't run command if input is empty
-0 Input is separated by NUL characters
-t Print the command on stderr before execution
-e[STR] STR stops input processing
-n N Pass no more than N args to PROG
-s N Pass command line of no more than N bytes
-x Exit if size is exceeded
xz -d [OPTIONS] [FILE]...
Decompress FILE (or stdin)
Options:
-d Decompress
-c Write to stdout
-f Force
xzcat FILE
Decompress to stdout
yes [STRING]
Repeatedly output a line with STRING, or 'y'
zcat FILE
Decompress to stdout
zcip [OPTIONS] IFACE SCRIPT
Manage a ZeroConf IPv4 link-local address
Options:
-f Run in foreground
-q Quit after obtaining address
-r 169.254.x.x Request this address first
-v Verbose
With no -q, runs continuously monitoring for ARP conflicts, exits only on I/O errors (link down etc)
GNU Libc (glibc) uses the Name Service Switch (NSS) to configure the behavior of the C library for the local environment, and to configure how it reads system data, such as passwords and group information. This is implemented using an /etc/nsswitch.conf configuration file, and using one or more of the /lib/libnss_* libraries. BusyBox tries to avoid using any libc calls that make use of NSS. Some applets however, such as login and su, will use libc functions that require NSS.
If you enable CONFIG_USE_BB_PWD_GRP, BusyBox will use internal functions to directly access the /etc/passwd, /etc/group, and /etc/shadow files without using NSS. This may allow you to run your system without the need for installing any of the NSS configuration files and libraries.
When used with glibc, the BusyBox 'networking' applets will similarly require that you install at least some of the glibc NSS stuff (in particular, /etc/nsswitch.conf, /lib/libnss_dns*, /lib/libnss_files*, and /lib/libresolv*).
Shameless Plug: As an alternative, one could use a C library such as uClibc. In addition to making your system significantly smaller, uClibc does not require the use of any NSS support files or libraries.
Denis Vlasenko <vda.linux@googlemail.com>
The following people have contributed code to BusyBox whether they know it or not. If you have written code included in BusyBox, you should probably be listed here so you can obtain your bit of eternal glory. If you should be listed here, or the description of what you have done needs more detail, or is incorrect, please send in an update.
Emanuele Aina <emanuele.aina@tiscali.it> run-parts
Erik Andersen <andersen@codepoet.org>
Tons of new stuff, major rewrite of most of the
core apps, tons of new apps as noted in header files.
Lots of tedious effort writing these boring docs that
nobody is going to actually read.
Laurence Anderson <l.d.anderson@warwick.ac.uk>
rpm2cpio, unzip, get_header_cpio, read_gz interface, rpm
Jeff Angielski <jeff@theptrgroup.com>
ftpput, ftpget
Edward Betts <edward@debian.org>
expr, hostid, logname, whoami
John Beppu <beppu@codepoet.org>
du, nslookup, sort
Brian Candler <B.Candler@pobox.com>
tiny-ls(ls)
Randolph Chung <tausq@debian.org>
fbset, ping, hostname
Dave Cinege <dcinege@psychosis.com>
more(v2), makedevs, dutmp, modularization, auto links file,
various fixes, Linux Router Project maintenance
Jordan Crouse <jordan@cosmicpenguin.net>
ipcalc
Magnus Damm <damm@opensource.se>
tftp client insmod powerpc support
Larry Doolittle <ldoolitt@recycle.lbl.gov>
pristine source directory compilation, lots of patches and fixes.
Glenn Engel <glenne@engel.org>
httpd
Gennady Feldman <gfeldman@gena01.com>
Sysklogd (single threaded syslogd, IPC Circular buffer support,
logread), various fixes.
Karl M. Hegbloom <karlheg@debian.org>
cp_mv.c, the test suite, various fixes to utility.c, &c.
Daniel Jacobowitz <dan@debian.org>
mktemp.c
Matt Kraai <kraai@alumni.cmu.edu>
documentation, bugfixes, test suite
Stephan Linz <linz@li-pro.net>
ipcalc, Red Hat equivalence
John Lombardo <john@deltanet.com>
tr
Glenn McGrath <bug1@iinet.net.au>
Common unarchiving code and unarchiving applets, ifupdown, ftpgetput,
nameif, sed, patch, fold, install, uudecode.
Various bugfixes, review and apply numerous patches.
Manuel Novoa III <mjn3@codepoet.org>
cat, head, mkfifo, mknod, rmdir, sleep, tee, tty, uniq, usleep, wc, yes,
mesg, vconfig, make_directory, parse_mode, dirname, mode_string,
get_last_path_component, simplify_path, and a number trivial libbb routines
also bug fixes, partial rewrites, and size optimizations in
ash, basename, cal, cmp, cp, df, du, echo, env, ln, logname, md5sum, mkdir,
mv, realpath, rm, sort, tail, touch, uname, watch, arith, human_readable,
interface, dutmp, ifconfig, route
Vladimir Oleynik <dzo@simtreas.ru>
cmdedit; xargs(current), httpd(current);
ports: ash, crond, fdisk, inetd, stty, traceroute, top;
locale, various fixes
and irreconcilable critic of everything not perfect.
Bruce Perens <bruce@pixar.com>
Original author of BusyBox in 1995, 1996. Some of his code can
still be found hiding here and there...
Tim Riker <Tim@Rikers.org>
bug fixes, member of fan club
Kent Robotti <robotti@metconnect.com>
reset, tons and tons of bug reports and patches.
Chip Rosenthal <chip@unicom.com>, <crosenth@covad.com>
wget - Contributed by permission of Covad Communications
Pavel Roskin <proski@gnu.org>
Lots of bugs fixes and patches.
Gyepi Sam <gyepi@praxis-sw.com>
Remote logging feature for syslogd
Linus Torvalds <torvalds@transmeta.com>
mkswap, fsck.minix, mkfs.minix
Mark Whitley <markw@codepoet.org>
grep, sed, cut, xargs(previous),
style-guide, new-applet-HOWTO, bug fixes, etc.
Charles P. Wright <cpwright@villagenet.com>
gzip, mini-netcat(nc)
Enrique Zanardi <ezanardi@ull.es>
tarcat (since removed), loadkmap, various fixes, Debian maintenance
Tito Ragusa <farmatito@tiscali.it>
devfsd and size optimizations in strings, openvt and deallocvt.