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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!
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awk, bash, curl, find, grep, Linux, sed
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Credits

Maintained by Jon H.

Site originally by David Winterbottom (user root).

Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

All commands from sorted by
Terminal - All commands - 12,411 results
(cd SRC; find . -type d -exec mkdir TARGET/{} ";"; find . -type f -exec mv {} TARGET/{} ";")
2009-08-17 12:35:48
User: karel1980
Functions: cd find mkdir mv
0
Up
Down
Merge ( directories [looking for improvement]

Using a GUI file managers you can merge directories (cut and paste). This command roughly does the same (it doesn't ask for confirmation (no problem for me) and it doesn't clean up the empty SRC directories (no problem, trivial).

probably does the same:

cp -l SRC TARGET; rm -rf SRC
Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
i=60;while [ $i -gt 0 ];do if [ $i -gt 9 ];then printf "\b\b$i";else printf "\b\b $i";fi;sleep 1;i=`expr $i - 1`;done
2011-09-08 18:14:48
User: barnesmjsa
Functions: printf sleep
0
Up
Down
60 second on screen timer for bash scripts
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cat /etc/squid/squid.conf | grep -v '^#' | sed '/^$/d'
2012-01-03 08:18:07
User: Bafus
Functions: cat grep sed
0
Up
Down
cat without comments

cat without comments

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git diff | git apply --reverse
2012-05-15 22:36:33
User: samer
Functions: diff
0
Up
Down
revert the unstaged modifications in a git working directory
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feh --bg-scale "`ls -d $HOME/backgrounds/* |sort -R |tail -1`"
2013-03-16 16:05:48
User: bertatum
0
Up
Down
Change wallpaper random

Change your Desktop background/wallpaper with feh lightweight command.

fill background directory with appropriate content.

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echo c > /proc/sysrq-trigger
2013-05-07 19:41:40
User: fangfufu
Functions: echo
Tags: kernel
0
Up
Down
Force a kernel panic

Well, this is quite useful for testing if your hardware watchdog is working properly.

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convert yourdoublewideimage.jpg -crop 50%x100% +repage output.jpg
2014-01-15 15:34:41
User: pagesix1536
Tags: jpeg jpg split convert
0
Up
Down
Split an image in half for use on dual screens (mostly for use under KDE which treats each screen separately)

Output should be two JPG files named like "output-1.jpg" and "output-2.jpg". The convert command is part of ImageMagick so you'll need that and dependent packages installed to use it.

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git commit --allow-empty-message --message ""
2014-07-16 02:06:39
User: nicolasmccurdy
0
Up
Down
Create a git commit with no message

This is especially useful for adding changes to a temporary repo, such as a Gist. Avoid using this when collaborating with others.

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pm2 start app.js
2014-11-07 23:15:12
User: strzel_a
0
Up
Down
Daemonize Node.js apps and ease your system administration workflow

I'm the author of PM2 and wrote this tool, and I'm please to share it here.

Github project link: https://github.com/Unitech/pm2

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
(acroread &);sleep 2;gdb /opt/Adobe/Reader8/Reader/intellinux/bin/acroread `pidof ld-linux.so.2`
2009-04-29 16:23:48
User: rhythmx
Tags: pdf gdb adobe debug
0
Up
Down
One liner gdb attach to Acrobat
Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
echo 2+3 |bc
2009-07-04 22:03:41
User: Kaio
Functions: echo
0
Up
Down
Calculator on the go

Handy use of bc in the command line. No need to get 'into' the bc to perform calculations

Show sample output | Comments (6) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
perl -ne '$pkg=$1 if m/^Package: (.*)/; print "$1\t$pkg\n" if m/^Installed-Size: (.*)/;' < /var/lib/dpkg/status | sort -rn | less
2009-10-19 12:55:59
User: hfs
Functions: perl sort
Tags: Debian sort perl dpkg
0
Up
Down
List your largest installed packages (on Debian/Ubuntu)

List packages and their disk usage in decreasing order. This uses the "Installed-Size" from the package metadata. It may differ from the actual used space, because e.g. data files (think of databases) or log files may take additional space.

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type <command>
2010-02-15 21:47:18
User: prayer
Functions: type
Tags: which PATH
0
Up
Down
shows the full path of shell commands
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find . -name "*.php" -exec grep -i -H "search pharse" {} \;
2010-07-22 11:54:45
User: wr8cr8
Functions: find grep
0
Up
Down
Find PHP files
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awk '{if ($1~/Sun|Mon|Tue|Wed|Thu|Fri|Sat/) {DATE=$2" "$3" "$4" "$5 } else {print DATE"|"$0}}' alterorcl.log
2010-11-26 01:40:58
User: hxre
Functions: awk
0
Up
Down
Handling oracle alter log file
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sudo netstat|head -n2|tail -n1 && sudo netstat -a|grep udp && echo && sudo netstat|head -n2|tail -n1 && sudo netstat -a|grep tcp
2011-09-08 18:54:36
User: brando56894
Functions: echo grep head netstat sudo tail
Tags: netstat udp tcp connections
0
Up
Down
Displays All TCP and UDP Connections
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echo foobar | sed -r 's/(^.|.$)//g'
2011-11-19 16:19:07
User: ebraminio
Functions: echo sed
Tags: bash sed
0
Up
Down
Remove the first and the latest caracter of a string

Just an other solution :)

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(sed 's/^/x*=/' file ; echo x) | bc
2012-01-03 13:45:25
User: fallen3angel
Functions: echo file sed
0
Up
Down
Fast way to get the product of every number in a file
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DATE=`date +"%H:%M" --date '-1 min'`; egrep "\ $DATE\:..\ " /var/log/dhcpd.log |awk '/DHCPREQUEST/ {split($3,t,":"); printf("%02d:%02d\n",t[1],t[2]);}' |uniq -c;
2013-03-17 02:23:37
User: jobewan
Functions: awk egrep uniq
0
Up
Down
Display count of log entries via the previous minute for graphing purposes. Example given is for DHCPREQUESTS on an ISC dhcp service log.
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hexdump -C file
2013-05-07 20:40:02
User: qistoph
Functions: hexdump
0
Up
Down
Hex Dump
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(date "+%d-%m-%Y %H:%M:%S";curl -s --interface lo:1 ifconfig.me| xargs -t geoiplookup 2>&1)|sed -e 's/geoiplookup/IP:/g' -e 's/GeoIP Country Edition/Country/g'|tr -s "\n" " "|sed 'a\ '
2013-10-07 15:28:55
User: guerito
Functions: date sed tr xargs
0
Up
Down
Localize a Public IP on a specific interface

My first command :) I made this command to log public addresses of a virtual interface who connects random VPN servers around the world.

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command_line 2>&1 | tee -a output_file
2014-04-05 13:02:30
User: esplinter
Functions: tee
Tags: tee redirect
0
Up
Down
redirect STDOUT and STDERR to STDOUT and also to a file
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git log --graph --decorate --pretty=oneline --abbrev-commit
2014-07-16 02:07:23
User: nicolasmccurdy
0
Up
Down
My git log alias
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for f in input/*; do BN=$(basename "$f"); ffmpeg -i "$f" -vn "temp/$BN.flac"...
2015-03-01 02:48:19
User: samcamwilliams
Functions: basename
0
Up
Down
Remove excess noise from a set of mp4 videos.

Full command:

for f in input/*; do BN=$(basename "$f"); ffmpeg -i "$f" -vn "temp/$BN.flac"; sox "temp/$BN.flac" "temp/$BN-cleaned.flac" noisered profile 0.3; ffmpeg -i "$f" -vcodec copy -an "temp/$BN-na.mp4"; ffmpeg -i "temp/$BN-na.mp4" -i "temp/$BN-cleaned.flac" "output/$BN"; done

This was over the 255 character limit and I didn't feel like deliberately obfuscating it.

1. Create 'input', 'output' and 'temp' directories.

2. Place the files that you want to remove the hiss/static/general noise from in the input directory.

3. Generate a noise reduction profile with sox using 'sox an_input_file.mp4 -n trim x y noiseprof profile', where x and y indicates a range in seconds that only the sound you want to eliminate is present in.

4. Run the command.

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#!/bin/bash find | grep -P -v "(class)|(zip)|(png)|(gz)|(gif)|(jpeg)|(jpg)" | xargs -I @ grep -H $1 @
2011-10-14 13:28:49
User: kirdie
Functions: find grep xargs
Tags: find grep
-1
Up
Down
find&grep all in once

calls grep on all non-binary files returned by find on its current working directory

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate