Bash Cheat sheets

!!	Last command
!foo	Run most recent command starting with 'foo...' (ex. !ps, !mysqladmin)
!foo:p	Print command that !foo would run, and add it as the latest to command history
!$	Last 'word' of last command ('/path/to/file' in the command 'ls -lAFh /path/to/file', '-uroot' in 'mysql -uroot')
!$:p	Print word that !$ would substitute
!*o	All but first word of last command ('-lAFh /path/to/file' in the command 'ls -lAFh /path/to/file', '-uroot' in 'mysql -uroot')
!*:p	Print words that !* would substitute
^foo^bar	Replace 'foo' in last command with 'bar', print the result, then run. ('mysqladmni -uroot', run '^ni^in', results in 'mysqladmin -uroot')
{a,b,c}	passes words to the command, substituting a, b, and c sequentially (`cp file{,.bk}` runs `cp file file.bk`)
Ctrl + a	Jump to the start of the line
Ctrl + b	Move back a char
Ctrl + c	Terminate the command
Ctrl + d	Delete from under the cursor
Ctrl + e	Jump to the end of the line
Ctrl + f	Move forward a char
Ctrl + k	Delete to EOL
Ctrl + l	Clear the screen
Ctrl + r	Search the history backwards
Ctrl + R	Search the history backwards with multi occurrence
Ctrl + t	Transpose the current char with the previous
Ctrl + u	Delete backward from cursor
Ctrl + w	Delete backward a word
Ctrl + xx	Move between EOL and current cursor position
Ctrl + x @	Show possible hostname completions
Ctrl + z	Suspend/ Stop the command
Ctrl + x; Ctrl + e	Edit line into your favorite editor
Alt + >	Move to the first line in the history
Alt + *lt;	Move to the last line in the history
Alt + ?	Show current completion list
Alt + *	Insert all possible completions
Alt + /	Attempt to complete filename
Alt + .	Yank last argument to previous command
Alt + b	Move backward
Alt + c	Capitalize the word
Alt + d	Delete word
Alt + f	Move forward
Alt + l	Make word lowercase
Alt + n	Search the history forwards non-incremental
Alt + p	Search the history backwards non-incremental
Alt + r	Recall command
Alt + t	Transpose the current word with the previous
Alt + u	Make word uppercase
Alt + back-space	Delete backward from cursor
(Here "2T" means Press TAB twice) $ 2T - All available commands(common) $ (string)2T - All available commands starting with (string) $ /2T - Entire directory structure including Hidden one $ (dir)2T - Only Sub Dirs inside (dir) including Hidden one $ *2T - Only Sub Dirs inside without Hidden one $ ~2T - All Present Users on system from "/etc/passwd" $ $2T - All Sys variables $ @2T - Entries from "/etc/hosts" $ =2T - Output like ls or dir .bash_profile = sourced by login shell, .bashrc = sourced by all shells, .bash_aliases = should be sourced by .bashrc
Run something: for i in a b c; do $i 'hello'; done Do something on a bunch of files: for i in *.rb; do echo $i; done If syntax: if [ -e .ssh ]; then echo "hi"; fi file check flags: -e: file exists -f: regular file (non directory) -d: directory -s: non-zero file -x: execute permission Avoid duplicates in your history: export HISTIGNORE="&:ls:ls *:[bf]g:exit"