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bash: |-
!! - 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
!* - 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 + > - 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"
more here: