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I've seen somebody do:

cp . yy/
cd !$

the last line translated to:

cd yy/

so I think !$ means "the last argument from previous line".

Am I right?

Are there any other substitution of this kind?

Where can I find the documentation for them?

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migrated from stackoverflow.com Apr 30 '12 at 16:07

This question came from our site for professional and enthusiast programmers.

    
Thanks! Now that I see that the question was pretty basic, and so you answered it in the comments and three of you already voted for closing it, what's the proper thing to do? Should I delete it or just leave it here unanswered? –  Sebastián Grignoli Apr 30 '12 at 4:38
1  
It will probably get migrated to super user, so I would leave it because it may be useful to future bash'ers on SU. I also threw in an answer. –  chown Apr 30 '12 at 4:43

1 Answer 1

up vote 9 down vote accepted

!$ is the last word of the last command.

More:

!! - 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

From http://cheat.errtheblog.com/s/bash/.

Also, lots of good stuff here: http://www.gnu.org/software/bash/manual/bashref.html
and here: http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_03_04.html.

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