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240 Cards in this Set
- Front
- Back
adduser
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Add a user to the system
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addgroup
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add a group to the system
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alias
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create and alias
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apropos
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search help manual pages (man -k)
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apt-get
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search for and install software packages
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aptitude
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search for and install software packages
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aspell
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spell checker
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awk
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find and replace text, database sort/validate/index
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basename
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strip directory and suffix from filenames
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bash
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GNU Bourne-Again SHell
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bc
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arbitrary precision calculator language
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bg
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send to background
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break
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exit from loop
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builtin
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run a shell builtin
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bzip2
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compress or decompress named file(s)
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cal
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display and calendar
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case
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conditionally perform a command
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cat
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display contents of a file
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cd
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change directory
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cfdisk
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partition table manipulator for Linux
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chgrp
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change group ownership
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chmod
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change access permissions
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chown
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change file owner and group
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chroot
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run a command with a different root directory
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chkconfig
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system services (runlevel)
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cksum
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print CRC checksum and byte counts
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clear
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clear terminal screen
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cmp
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compare two files
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comm
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compare two sorted files line by line
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command
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run a command - ignore shell functions
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continue
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resume the next iteration of a loop
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cp
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copy one or more files to another location
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cron
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daemon to execute scheduled commands
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crontab
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schedule a command to run at a later time
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csplit
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split a file into context-determined pieces
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cut
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divide a file into several parts
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date
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display or change the date and time
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dc
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disk calculator
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dd
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convert and copy a file, write disk headers, boot records
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ddrescue
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data recovery tool
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declare
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declare variables and give them attributes
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df
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display free disk space
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diff
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display differences between two files
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diff3
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show differences among three files
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dig
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DNS lookup
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dir
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briefly list directory contents
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dircolors
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colour setup for "ls"
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dirname
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convert a full pathname to just a path
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dirs
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display list of remembered directories
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dmesg
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print kernel and driver messages
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du
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estimate file space usage
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echo
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display message on screen
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egrep
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search file(s) for lines that match and extended expression
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eject
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eject removable media
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enable
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enable and disable builtin shell commands
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env
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environment variables
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ethtool
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ethernet card settings
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eval
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evaluate several commands/arguments
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exec
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execute a command
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exit
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exit the shell
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expect
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automate arbitrary applications accessed over a terminal
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expand
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convert tabs to spaces
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export
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set an environment variable
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expr
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evaluate expressions
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false
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do nothing, unsuccessfully
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fdformat
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low-level format a floppy disk
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fdisk
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partition table manipulator for Linux
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fg
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send job to foreground
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fgrep
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search file(s) for lones that match a fixed string
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file
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determine file type
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find
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search for files that meet a desired criteria
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fmt
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reformat paragraph text
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fold
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wrap text to fit a specified width
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for
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expand words, and execute commands
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format
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format disks or tapes
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free
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display memory usage
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fsck
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file system consistency check and repair
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ftp
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file transfer protocol
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function
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define function macros
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fuser
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identify/kill the process that is accessing a file
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gawk
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find and replace the text within file(s)
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getopts
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parse positional parameters
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grep
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search file(s) for lines that match a given pattern
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groups
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print group names a user is in
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gzip
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compress or decompress named file(s)
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hash
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remember the full pathname of a name argument
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head
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output the first part of files
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help
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display help for a built-in command
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history
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command history
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hostname
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print or set system name
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iconv
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convert the character set of a file
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id
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print user and group id's
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if
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conditionally perform a command
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ifconfig
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configure a network interface
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ifdown
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stop a network interface
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ifup
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start a network interface up
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import
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capture an X server screen and save the image to a file
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install
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copy files and set attributes
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jobs
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list active jobs
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join
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join lines on a common field
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kill
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stop a process from running
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killall
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kill processes by name
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less
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display output one screen at a time
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let
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perform arithmetic on shell variables
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ln
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make links between files
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local
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create variables
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locate
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find files
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logname
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print current login name
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logout
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exit a login shell
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look
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display lines beginning with a given string
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lpc
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line printer control program
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lpr
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off line print
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lprint
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print a file
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lprintd
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abort a print job
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lprintq
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list the print queue
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lprm
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remove jobs from the print queue
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ls
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list information about file(s)
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lsof
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list open files
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make
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recompile a group of programs
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man
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help manual
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mkdir
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create new folder(s)
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mkfifo
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make fifos (named pipes)
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mkisofs
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create a hybrid ISO9660/JOLIET/HFS filesystem
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mknod
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make block or character special files
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more
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display output one screen at a time
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mount
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mount a file system
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mtools
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manipulate ms-dos files
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mtr
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network diagnostics (traceroute/ping)
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mv
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move or rename files or directories
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mmv
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mass move and rename file(s)
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netstat
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networking information
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nice
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set the priority of a command or job
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nl
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number of lines and write files
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nohup
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run a command immune to hangups
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notify-send
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send desktop notifications
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nslookup
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query internet name servers interactively
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open
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open a file in its default application
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op
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operator access
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passwd
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modify a user password
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paste
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merge lines of files
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pathchk
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check file name portability
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ping
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test a network connection
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pkill
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stop processes from running
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popd
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restores the previous value of the current directory
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pr
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prepare files for printing
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printcap
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printer capability database
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printenv
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print environment variables
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printf
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format and print data
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ps
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process status
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pushd
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save and then change the current directory
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pxd
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print working directory
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quota
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display disk usage and limits
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quotacheck
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scan a file system for disk usage
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quotactl
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set disk quotas
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ram
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ram disk device
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rcp
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copy files between two machines
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read
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read a line from standard input
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readarray
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read from stdin into an array variable
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readonly
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mark variables/functions as read only
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reboot
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reboot the system
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rename
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rename files
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renice
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alter priority of running processes
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remsync
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synchronize remote files via email
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return
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exit a shell function
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rev
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reverse lines of a file
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rm
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remove files
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rmdir
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remove folder(s)
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rsync
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remote file copy (Synchronize files trees)
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screen
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multiplex terminal, run remote shells via ssh
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scp
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secure copy (remote file copy)
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sdiff
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merge two file interactively
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sed
|
stream editor
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select
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accept keyboard input
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seq
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print numeric sequences
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set
|
manipulate shell variables and functions
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sftp
|
secure file transfer protocols
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shift
|
shift positional parameters
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shopt
|
shell options
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shutdown
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shutdown or restart linux
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sleep
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delay for a specified time
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slocate
|
find files
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sort
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sort text files
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source
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run commands from a file
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split
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split a file into fixed-size pieces
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ssh
|
secure shell client (remote login program)
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strace
|
trace system calls and signals
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su
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substitute user identity
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sudo
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execute a command as another user
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su,
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print a checksum for a file
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suspend
|
suspend execution of this shell
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symlink
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make a new name for a file
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sync
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synchronize data on disk with memory
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tail
|
output the last part of a file(s)
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tar
|
tape archiver
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tee
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redirect output to multiple files
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test
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evaluate a conditional expression
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time
|
measure program running time
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times
|
user and system times
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touch
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change file timestamps
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top
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list processes running on the system
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traceroute
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trace route to host
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trap
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run a command when a signal is set (bourne)
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tr
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translate, squeeze, and/or delete character
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true
|
do nothing, successfully
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tsort
|
topological sort
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tty
|
print filename of terminal on stdin
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type
|
describe a command
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ulimit
|
limit user resources
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umask
|
users file creation mask
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umount
|
unmount a device
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unalias
|
remove an alias
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uname
|
print system information
|
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unexpand
|
convert spaces to tabs
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uniq
|
uniquify files
|
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units
|
convert units from one scale to another
|
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unset
|
remove variable or function names
|
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unshar
|
unpack shell archive scripts
|
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until
|
execute commands (until error)
|
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useradd
|
create new user account
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usermod
|
modify user account
|
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users
|
list users currently logged in
|
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uuencode
|
encode binary file
|
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uudecode
|
decode a file created by uuencode
|
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v
|
verbosely list directory contents (ls -l -b)
|
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vdir
|
verbosely list directory contents (ls -l -b)
|
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vi
|
text editor
|
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vmstat
|
report virtual memory statistics
|
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watch
|
execute/display a program periodically
|
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wc
|
print byte, word, and line counts
|
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whereis
|
search the user's $path, man pages and source files for a program
|
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which
|
search user's $path for a program file
|
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while
|
execute commands
|
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who
|
print all usernames currently logged in
|
|
whoami
|
print the current user id and name (id -un)
|
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wget
|
retrieve web pages or files via http, https or ftp
|
|
write
|
send a message to another user
|
|
xargs
|
execute utility, passing constructed argument list(s)
|
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xdg-open
|
open a file or URL in the user's preferred application
|
|
.
|
run a command script in the current shell
|
|
###
|
comment / remark
|