glugt-mgl

 

Shell cheat sheet

Page history last edited by msk 2 yrs ago

A

  • alias Create an alias
  • awk Find and Replace text within file(s)

B

  • break Exit from a loop
  • builtin Run a shell builtin

C

  • cal Display a calendar
  • case Conditionally perform a command
  • cat Display the contents of a file
  • cd Change Directory
  • chgrp Change group ownership
  • chmod Change access permissions
  • chown Change file owner and group
  • chroot Run a command with a different root directory
  • cksum Print CRC checksum and byte counts
  • clear Clear terminal screen
  • cmp Compare two files
  • comm Compare two sorted files line by line
  • command Run a command - ignoring shell functions
  • continue Resume the next iteration of a loop
  • cp Copy one or more files to another location
  • cron Daemon to execute scheduled commands
  • crontab Schedule a command to run at a later time
  • csplit Split a file into context-determined pieces
  • cut Divide a file into several parts

D

  • date Display or change the date & time
  • dc Desk Calculator
  • dd Data Dump - Convert and copy a file
  • declare Declare variables and give them attributes
  • df Display free disk space
  • diff Display the differences between two files
  • diff3 Show differences among three files
  • dir Briefly list directory contents
  • dircolors Colour setup for `ls’
  • dirname Convert a full pathname to just a path
  • dirs Display list of remembered directories
  • du Estimate file space usage

E

  • echo Display message on screen
  • ed A line-oriented text editor (edlin)
  • egrep Search file(s) for lines that match an extended expression
  • eject Eject CD-ROM
  • enable Enable and disable builtin shell commands
  • env Display, set, or remove environment variables
  • eval Evaluate several commands/arguments
  • exec Execute a command
  • exit Exit the shell
  • expand Convert tabs to spaces
  • export Set an environment variable
  • expr Evaluate expressions

F

  • factor Print prime factors
  • false Do nothing, unsuccessfully
  • fdformat Low-level format a floppy disk
  • fdisk Partition table manipulator for Linux
  • fgrep Search file(s) for lines that match a fixed string
  • find Search for files that meet a desired criteria
  • fmt Reformat paragraph text
  • fold Wrap text to fit a specified width.
  • for Expand words, and execute commands
  • format Format disks or tapes
  • free Display memory usage
  • fsck Filesystem consistency check and repair.
  • function Define Function Macros

G

  • gawk Find and Replace text within file(s)
  • getopts Parse positional parameters
  • grep Search file(s) for lines that match a given pattern
  • groups Print group names a user is in
  • gzip Compress or decompress named file(s)

H

  • hash Remember the full pathname of a name argument
  • head Output the first part of file(s)history Command History
  • hostname Print or set system name

I

  • id Print user and group id’s
  • if Conditionally perform a command
  • import Capture an X server screen and save the image to file
  • info Help info
  • install Copy files and set attributes

J

  • join Join lines on a common field

K

  • kill Stop a process from running

L

  • less Display output one screen at a time
  • let Perform arithmetic on shell variables
  • ln Make links between files
  • local Create variables
  • locate Find files
  • logname Print current login name
  • logout Exit a login shell
  • lpc Line printer control program
  • lpr Off line print
  • lprint Print a file
  • lprintd Abort a print job
  • lprintq List the print queue
  • lprm Remove jobs from the print queue
  • ls List information about file(s)

M

  • m4 Macro processor
  • man Help manual
  • mkdir Create new folder(s)
  • mkfifo Make FIFOs (named pipes)
  • mknod Make block or character special files
  • more Display output one screen at a time
  • mount Mount a file system
  • mtools Manipulate MS-DOS files
  • mv Move or rename files or directories

N

  • nice Set the priority of a command or job
  • nl Number lines and write files
  • nohup Run a command immune to hangups

P

  • passwd Modify a user password
  • paste Merge lines of files
  • pathchk Check file name portability
  • popd Restore the previous value of the current directory
  • pr Convert text files for printing
  • printcap Printer capability database
  • printenv Print environment variables
  • printf Format and print data
  • ps Process status
  • pushd Save and then change the current directory
  • pwd shows Present Working Directory*

Q

  • quota Display disk usage and limits
  • quotacheck Scan a file system for disk usage
  • quotactl Set disk quotas

R

  • ram ram disk device
  • rcp Copy files between two machines.
  • read read a line from standard input
  • readonly Mark variables/functions as readonly
  • remsync Synchronize remote files via email
  • return Exit a shell function
  • rm Remove files
  • rmdir Remove folder(s)
  • rpm Remote Package Manager
  • rsync Remote file copy (Synchronize file trees)

S

  • scp Secure copy (remote file copy)

     

  • screen Terminal window manager
  • sdiff Merge two files interactively
  • sed Stream Editor
  • select Accept keyboard input
  • seq Print numeric sequences
  • set Manipulate shell variables and functions
  • shift Shift positional parameters
  • shopt Shell Options
  • shutdown Shutdown or restart linux
  • sleep Delay for a specified time
  • sort Sort text files
  • source Run commands from a file `.'
  • split Split a file into fixed-size pieces
    ssh secure Shell client (remote login program)
  • su Switch to super-user (root)
    sudo Execute the command as super-user (root)
  • sum Print a checksum for a file
  • symlink Make a new name for a file
  • sync Synchronize data on disk with memory

T

  • tac Concatenate and write files in reverse
  • tail Output the last part of files
  • tar Tape ARchiver
  • tee Redirect output to multiple files
  • test Evaluate a conditional expression
  • time Measure Program Resource Use
  • times User and system times
  • touch Change file timestamps
  • top List processes running on the system
  • traceroute Trace Route to Host
  • trap Run a command when a signal is set(bourne)
  • tr Translate, squeeze, and/or delete characters
  • true Do nothing, successfully
  • tsort Topological sort
  • tty Print filename of terminal on stdin
  • type Describe a command

U

  • ulimit Limit user resources
  • umask Users file creation mask
  • umount Unmount a device
  • unalias Remove an alias
  • uname Print system information
  • unexpand Convert spaces to tabs
  • uniq Uniquify files
  • units Convert units from one scale to another
  • unset Remove variable or function names
  • unshar Unpack shell archive scripts
  • until Execute commands (until error)
  • useradd Create new user account
  • usermod Modify user account
  • users List users currently logged in
  • uuencode Encode a binary file uudecode Decode a file created by uuencode

V

  • v Verbosely list directory contents (`ls -l -b’)
  • vdir Verbosely list directory contents (`ls -l -b’)
    vi Text Editor

W

  • watch Execute/display a program periodically
  • wc Print byte, word, and line counts
    wget Retrieve web pages or files via HTTP, HTTPS or FTP
  • whereis Report all known instances of a command
  • which Locate a program file in the user’s path.
  • while Execute commands
  • who Print all usernames currently logged in
  • whoami Print the current user id and name (`id -un’)

X

  • xargs Execute utility, passing constructed argument list(s)

Y

  • yes Print a string until interrupted
  • .period Run commands from a file
  • ### Comment / Remark

 

Comments (3)

Suren said

at 4:48 pm on Jun 2, 2007

This page was created by alagu and edited by msk
Thanks very much to alagu :)

moved from old wiki

Suren said

at 4:49 pm on Jun 2, 2007

flicked from http://wiki.typo3.org/index.php/Linux_cheat_sheet
:p

sp2hari said

at 10:43 pm on Jun 12, 2007

Second line in this page says "awk Find and Replace text within file(s)"
I am not sure whether awk has a replace feature. All it can do is act as a parser. Correct me if i am wrong.

You don't have permission to comment on this page.

Printable version
 
Anonymous Create an account or Log in