What's this?

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

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Universal configuration monitoring and system of record for IT.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:



May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

Top Tags





Commands using sed from sorted by
Terminal - Commands using sed - 1,136 results
spellcheck(){ typeset y=$@;curl -sd "<spellrequest><text>$y</text></spellrequest>" https://www.google.com/tbproxy/spell|sed -n '/s="[0-9]"/{s/<[^>]*>/ /g;s/\t/ /g;s/ *\(.*\)/Suggestions: \1\n/g;p}'|tee >(grep -Eq '.*'||echo -e "OK");}
2010-02-17 08:20:48
User: eightmillion
Functions: echo grep sed tee

I took matthewbauer's cool one-liner and rewrote it as a shell function that returns all the suggestions or outputs "OK" if it doesn't find anything wrong. It should work on ksh, zsh, and bash. Users that don't have tee can leave that part off like this:

spellcheck(){ typeset y=$@;curl -sd "<spellrequest><text>$y</text></spellrequest>" https://google.com/tbproxy/spell|sed -n '/s="[1-9]"/{s/<[^>]*>/ /g;s/\t/ /g;s/ *\(.*\)/Suggestions: \1\n/g;p}';}
spellcheck(){ curl -sd "<spellrequest><text>$1</text></spellrequest>" https://www.google.com/tbproxy/spell | sed 's/.*<spellresult [^>]*>\(.*\)<\/spellresult>/\1/;s/<c \([^>]*\)>\([^<]*\)<\/c>/\1;\2\n/g' | grep 's="1"' | sed 's/^.*;\([^\t]*\).*$/\1/'; }
ls *.jpg | grep -n "" | sed 's,.*,0000&,' | sed 's,0*\(...\):\(.*\).jpg,mv "\2.jpg" "image-\1.jpg",' | sh
curl -s -u $username:$password | grep '<td>.* </td>' | sed 's|\t<td>\(.*\) </td>\r|\1|' | tr '\n' ';' | sed 's/\([^;]*\);\([^;]*\);/\2\t\1\n/g'
2010-02-16 02:27:11
User: matthewbauer
Functions: grep sed tr

Will create a sample etc host file based on your router's dhcp list.

Now I know this won't work on most routers, so please don't downvote it just because it doesn't work for you.

xmms2 list | sed -n -e '1i\0' -e 's/^.*(\([0-9]*\):\([0-9]*\))$/\1 60*\2++/gp' -e '$a\60op' | dc | sed -e 's/^ *//' -e 's/ /:/g'
xmms2 info $(xmms2 mlib search '<query>' | sed -ne 's/^00*\([1-9][0-9]*\).*$/\1/p') | awk -F' = ' '$1~/ url$/{print$2}'
curl -s www.google.com/ig/api?weather=$(curl -s api.hostip.info/get_html.php?ip=$(curl -s icanhazip.com) | sed -e'1d;3d' -e's/C.*: \(.*\)/\1/' -e's/ /%20/g' -e"s/'/%27/g") | sed 's|.*<t.*f data="\([^"]*\)"/>.*|\1\n|'
2010-02-14 19:44:54
User: o0110o
Functions: sed

Check your local temperature based on geolocation.

username=matthewbauer; curl -s http://www.commandlinefu.com/commands/by/$username/json | tr '{' '\n' | grep -Eo ',"votes":"[0-9\-]+","' | grep -Eo '[0-9\-]+' | tr '\n' '+' | sed 's/+$/\n/' | bc
2010-02-14 04:32:36
User: matthewbauer
Functions: grep sed tr

This will calculate the your commandlinefu votes (upvotes - downvotes).

Hopefully this will boost my commandlinefu points.

function setx(){ sed '/[xv]/!Q2' <<< $- && { set +xv; export PS4=">>> "; } || { export PS4="`tput setaf 3`>>> `tput sgr0`"; set -xv; }; }
2010-02-14 01:25:44
User: AskApache
Functions: export sed set

Running this command turns shell tracing and shell verbose debugging on or off. Not only does it do that, it also uses your terminals builtin method of setting colors to make debugging much easier.

It looks at the current shell options contained in the $- special bash variable and that lets this function set the opposite of the current value. So from the shell you could do a:

setx; echo "y" | ( cat -t ) | echo "d"; setx

and it will turn on debbuggin.

This is an amazingly useful function that is perfect to add system-wide by adding it to /etc/profile or /etc/bashrc.. You can run it from the shell, and you can also use it in your shell scripts like my .bash_profile - http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

curl -s http://www.google.com/ig/api?weather=$(curl -s "http://api.hostip.info/get_html.php?ip=$(curl -s icanhazip.com)" | grep City | sed 's/City: \(.*\)/\1/' | sed 's/ /%20/g' | sed "s/'/%27/g") | sed 's|.*<temp_f data="\([^"]*\)"/>.*|\1\n|'
uri_escape(){ echo -E "$@" | sed 's/\\/\\\\/g;s/./&\n/g' | while read -r i; do echo $i | grep -q '[a-zA-Z0-9/.:?&=]' && echo -n "$i" || printf %%%x \'"$i" done }
2010-02-13 01:39:51
User: infinull
Functions: echo grep printf read sed

This one uses hex conversion to do the converting and is in shell/sed only (should probably still use the python/perl version).

echo "$@" | sed 's/ /%20/g;s/!/%21/g;s/"/%22/g;s/#/%23/g;s/\$/%24/g;s/\&/%26/g;s/'\''/%27/g;s/(/%28/g;s/)/%29/g;s/:/%3A/g'
function svnurl() { svn info $1 | egrep '^URL: (.*)' | sed s/URL\:\ //; }
2010-02-12 15:42:54
User: thebuckst0p
Functions: egrep info sed

Can be used in a working copy to output the URL (extracted from svn info), or as part of another function, as $(svnurl some/path). Saves a lot of time in my SVN workflow.

sed 's/pattern/^[[1m&^[[0m/g'
sed 's/.*/ /'
2010-02-11 17:45:56
User: putnamhill
Functions: sed
Tags: sed

The first version printed:

tr: empty string2

The second version printed:

sed: -i may not be used with stdin

Maybe I misunderstood the orginal problem.

curl -s -H "Authorization: GoogleLogin auth=$auth" "http://www.google.com/reader/api/0/unread-count?output=json" | tr '{' '\n' | sed 's/.*"count":\([0-9]*\),".*/\1/' | grep -E ^[0-9]+$ | tr '\n' '+' | sed 's/\(.*\)+/\1\n/' | bc
2010-02-11 00:42:57
User: matthewbauer
Functions: grep sed tr

Get Google Reader unread count from the command line.

You'll have to define your auth token with $auth

Or use:

curl -s -H "Authorization: GoogleLogin auth=$(curl -sd "Email=$email&Passwd=$password&service=reader" https://www.google.com/accounts/ClientLogin | grep Auth | sed 's/Auth=\(.*\)/\1/')" "http://www.google.com/reader/api/0/unread-count?output=json" | tr '{' '\n' | sed 's/.*"count":\([0-9]*\),".*/\1/' | grep -E ^[0-9]+$ | tr '\n' '+' | sed 's/\(.*\)+/\1\n/' | bc
ps aux | sed -n '/USER/!s/\([^ ]\) .*/\1/p' | sort -u
2010-02-10 05:56:26
User: infinull
Functions: ps sed sort

This is different that `who` in that who only cares about logged-in users running shells, this command will show all daemon users and what not; also users logged in remotely via SSH but are running SFTP/SCP only and not a shell.

curl -s "http://www.google.com/ig/api?weather=New%20York" | sed 's|.*<temp_f data="\([^"]*\)"/>.*|\1|'
2010-02-08 23:06:48
User: matthewbauer
Functions: sed

Will return temperature in Fahrenheit of a location (New York City in example).

Uses a Google API.

ls . | xargs file | grep text | sed "s/\(.*\):.*/\1/" | xargs gedit
curl -s https://www.google.com/accounts/ClientLogin -d Email=$email -d Passwd=$password -d service=lh2 | grep Auth | sed 's/Auth=\(.*\)/\1/'
sudo sed -iorig '/\(up\|down\)/s/^/#/' /etc/zsh/zshrc
2010-02-02 23:17:08
User: cbrinker
Functions: sed sudo
Tags: Ubuntu vi zsh

Use sed to comment out any up/down bindings in zsh

nm-tool 2>/dev/null|sed -n '/Type:[ ]*802.11 WiFi/,/IPv4 Settings/{ /State:[ ]*connected/,/IPv4 Settings/{ s/^[ ]*//;/^\*.*Infra/ { s/^*//;s/:.*//;p }}}'
xrandr -q|sed -n 's/.*current[ ]\([0-9]*\) x \([0-9]*\),.*/\1x\2/p'
2010-02-02 10:00:31
User: chmouel
Functions: sed

To show your current resolution on your desktop

find . -type f |xargs -I% sed -i '/group name/s/>/ deleteMissing="true">/' %
2010-02-01 21:09:57
User: 4fthawaiian
Functions: find sed xargs

Changed out the for loop for an xargs. It's a tad shorter, and a tad cleaner.

for i in `find . -type f`; do sed -i '/group name/s/>/ deleteMissing="true">/' $i; done
2010-02-01 17:16:37
User: allrightname
Functions: sed

Recursively replace a string in files with lines matching string. Lines with the string "group name" will have the first > character replaced while other > characters on other lines will be ignored.