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commandlinefu.com is the place to record those command-line gems that you return to again and again.

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Terminal - All commands - 12,159 results
sudo !!
2009-01-26 10:26:48
User: root
1054

Useful when you forget to use sudo for a command. "!!" grabs the last run command.

python -m SimpleHTTPServer
^foo^bar
2009-01-26 13:25:37
User: root
478

Really useful for when you have a typo in a previous command. Also, arguments default to empty so if you accidentally run:

echo "no typozs"

you can correct it with

^z
ctrl-x e
2009-03-11 09:26:05
User: fool
431

Next time you are using your shell, try typing ctrl-x e (that is holding control key press x and then e). The shell will take what you've written on the command line thus far and paste it into the editor specified by $EDITOR. Then you can edit at leisure using all the powerful macros and commands of vi, emacs, nano, or whatever.

<space>command
2009-03-17 16:25:29
User: eaZy
388

Prepending one or more spaces to your command won't be saved in history.

Useful for pr0n or passwords on the commandline.

Tested on BASH.

'ALT+.' or '<ESC> .'
2009-03-20 11:36:04
User: atoponce
273

When typing out long arguments, such as:

cp file.txt /var/www/wp-content/uploads/2009/03/

You can put that argument on your command line by holding down the ALT key and pressing the period '.' or by pressing <ESC> then the period '.'. For example:

cd 'ALT+.'

would put '/var/www/wp-content/uploads/2009/03/ as my argument. Keeping pressing 'ALT+.' to cycle through arguments of your commands starting from most recent to oldest. This can save a ton of typing.

reset
2009-01-28 22:22:01
User: root
Functions: reset
270

If you bork your terminal by sending binary data to STDOUT or similar, you can get your terminal back using this command rather than killing and restarting the session. Note that you often won't be able to see the characters as you type them.

mount | column -t
2009-03-20 14:18:56
User: thechile
Functions: column mount
258

Particularly useful if you're mounting different drives, using the following command will allow you to see all the filesystems currently mounted on your computer and their respective specs with the added benefit of nice formatting.

echo "ls -l" | at midnight
2009-01-25 21:07:42
User: root
Functions: at echo
218

This is an alternative to cron which allows a one-off task to be scheduled for a certain time.

ssh -N -L2001:localhost:80 somemachine
dig +short txt <keyword>.wp.dg.cx
2009-07-31 16:08:59
User: drizzt
Functions: dig
210

Query Wikipedia by issuing a DNS query for a TXT record. The TXT record will also include a short URL to the complete corresponding Wikipedia entry.You can also write a little shell script like:

$ cat wikisole.sh

#!/bin/sh

dig +short txt ${1}.wp.dg.cx

and run it like

./wikisole.sh unix

were your first option ($1) will be used as search term.

curl ifconfig.me
2010-04-21 13:10:33
User: aajjk
209

curl ifconfig.me/ip -> IP Adress

curl ifconfig.me/host -> Remote Host

curl ifconfig.me/ua ->User Agent

curl ifconfig.me/port -> Port

thonks to http://ifconfig.me/

man ascii
!!:gs/foo/bar
2009-02-11 10:20:15
User: Tronks
191

Very useful for rerunning a long command changing some arguments globally.

As opposed to ^foo^bar, which only replaces the first occurrence of foo, this one changes every occurrence.

dd if=/dev/dsp | ssh -c arcfour -C username@host dd of=/dev/dsp
2009-02-08 10:10:00
User: morpheus
Functions: dd ssh
182

This will output the sound from your microphone port to the ssh target computer's speaker port. The sound quality is very bad, so you will hear a lot of hissing.

mount -t tmpfs tmpfs /mnt -o size=1024m
2009-02-06 00:33:08
User: ajrobinson
Functions: mount
177

Makes a partition in ram which is useful if you need a temporary working space as read/write access is fast.

Be aware that anything saved in this partition will be gone after your computer is turned off.

sshfs name@server:/path/to/folder /path/to/mount/point
2009-02-05 20:17:41
User: ihasn
174

Install SSHFS from http://fuse.sourceforge.net/sshfs.html

Will allow you to mount a folder security over a network.

wget --random-wait -r -p -e robots=off -U mozilla http://www.example.com
2009-02-17 22:53:07
User: starchox
Functions: wget
160

-p parameter tells wget to include all files, including images.

-e robots=off you don't want wget to obey by the robots.txt file

-U mozilla as your browsers identity.

--random-wait to let wget chose a random number of seconds to wait, avoid get into black list.

Other Useful wget Parameters:

--limit-rate=20k limits the rate at which it downloads files.

-b continues wget after logging out.

-o $HOME/wget_log.txt logs the output

<ctrl+u> [...] <ctrl+y>
2010-07-23 03:33:46
User: adeverteuil
159

Example :

vim /etc/fstab

## damn

<ctrl+u> sudo <ctrl+y>

## like a boss.

Example 2 :

sudo vim /root/bin/

##uh... autocomplete doesn't work...

<ctrl+u> sudo ls /root/bin

##ah! that's the name of the file!

<ctrl+y> sudo vim /root/bin/ ##resume here! Thanks readline!
curl -u user:pass -d status="Tweeting from the shell" http://twitter.com/statuses/update.xml
ctrl-l
ssh user@host cat /path/to/remotefile | diff /path/to/localfile -
2009-02-04 11:33:19
User: root
Functions: cat diff ssh
150

Useful for checking if there are differences between local and remote files.

(cd /tmp && ls)
time read (ctrl-d to stop)
2009-03-20 22:50:06
User: mrttlemonde
Functions: read time
136

time read -sn1 (s:silent, n:number of characters. Press any character to stop)

ssh -t reachable_host ssh unreachable_host
2009-03-03 23:21:36
User: patko
Functions: ssh
Tags: ssh
136

Unreachable_host is unavailable from local network, but it's available from reachable_host's network. This command creates a connection to unreachable_host through "hidden" connection to reachable_host.