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2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.




All commands from sorted by
Terminal - All commands - 11,860 results
pdfjam --clip true --trim '10mm 11cm 22pts 0' m.pdf
2014-07-08 10:57:54
User: qdrizh
Functions: true

This will crop each page of the PDF by 10mm left, 11cm bottom, 22pts right, and nothing from the top.

puppet config print modulepath
nmap -sP 192.168.1.*
2014-07-08 08:39:14
User: narven

you need to have nmap installed

sudo apt-get install nmap -y

sudo yum install nmap -y

dir=${PWD##*/}; rename "s/`ls -b1 | head -n1 | sed 's/.\{4\}$//'`/$dir/" -v *
2014-07-08 03:20:04
User: codycook
Functions: dir rename

I use this on Debian to rename files that exist in directories but do not have the year in the file name. The directory has the year but the files inside don't.

How I explain how this runs:

The dir variable grabs the name of the folder.

Using rename, substitute the name of the first file and remove the extension, then rename it to the directory name.

To test this before you run it, change -v to -vn.

xclip -o -selection clipboard | sort | xclip -i -selection clipboard
2014-07-07 19:04:02
User: gumnos
Functions: sort

Does the same thing in environments where you have "xclip" instead of "pbpaste"/"pbpate" and "pbcopy".

pbpate | sort | pbcopy
pbpaste | say -v Alex -o /tmp/say.aiff && sox /tmp/say.aiff say.mp3
git log master...feature-a | grep -o -E '\b([A-Z]+)-[0-9]+\b' | sort | uniq
2014-07-07 18:51:01
User: westonruter
Functions: grep sort

To get the list of tickets in a comma-separated list, pipe the above into:

sort | uniq | perl -pe 's/\n/, /' | sed 's/, $//'
wget -r -nd -q -A "*.ext" http://www.example.org/
wget www.google.com
csi -R uri-common -p '(uri-decode-string (read-line))'
powershell -Command "while (\$true){Try{\$process=Get-Process firefox -ErrorAction Stop}Catch [Microsoft.PowerShell.Commands.ProcessCommandException]{break;}if (\$process) {\$whateva=\$process.CloseMainWindow()}else {break;}Start-Sleep -m 500}"
2014-07-04 11:06:22
User: adanisch

This command will loop until the process no longer exists, calling closemainwindow() this is as if the user clicked the close window x in the upper right hand corner and gives the user an opportunity to save work in many applications like notepad and other things. The $'s are escaped for Cygwin, if you want to run the same command from the RUN box or cmd.exe shell then just unescape the $'s:

powershell -Command "while ($true){Try{$process=Get-Process calc -ErrorAction Stop}Catch [Microsoft.PowerShell.Commands.ProcessCommandException]{break;}if ($process) {$whateva=$process.CloseMainWindow()}else {break;}Start-Sleep -m 500}"

# dstat
macdst="5873b856445f";macsrc="d2a791e1715a";pkt="d4c3b2a1020004000000000000000000ffff000001000000e3eab353fa1f 0b007400000074000000$macdst $macsrc 0842ffffffffffff";for i in {1..16}; do pkt="$pkt $macdst"; done; echo "$pkt" | xxd -r -p > magicpacket.pcap
2014-07-02 17:37:44
Functions: echo

just set macdst to the mac address of the system

you wish to wake up, the macsrc is optional but helps

use tcpreplay to broadcast or wireshark to view

sudo ln -s /Applications/MAMP/tmp/mysql/mysql.sock /tmp/mysql.sock
ssh <user>@<ip address> $(echo wmic process where \"name like \'%<process to kill>%\'\" delete)
2014-07-02 04:41:05
User: adanisch
Functions: echo ssh

Tested on Windows 8 w/SSH, Cygwin - it can be tricky to quote if you dont use the $(..) syntax to echo it back out

perl -M URI::Escape -lne 'print uri_unescape($_)'
echo "btrfs checksum error(s) on: " && grep "btrfs: checksum error at logical" /var/log/messages | sed -e 's/^.*\( dev .*\)\(, sector.*\)\(path\: .*\))/\t\1, \3/' | sort | uniq
grep "btrfs: checksum error at logical" /var/log/messages | egrep -o "[^ ]+$" | tr -d ')' | sort | uniq
2014-07-01 08:15:26
User: jcoll
Functions: egrep grep sort tr

Filter entries in OpenSuse /var/log/messages like:

timestamp servername kernel: [83242.108090] btrfs: checksum error at logical 1592344576 on dev /dev/sda5, sector 5223584, root 5, inode 2652, offset 282624, length 4096, links 1 (path: log/warn)

echo -e '\x2Hello, folks\t!\r' | sed "y/\x2\x9\xD\x20/&#9218;&#9225;&#9229;&#9248;/"
2014-06-30 14:42:15
User: hermannsw
Functions: echo sed

Not better, but more lightweight (sed instead of perl).

Above command is reduced due to length restriction of less than 256 characters and entity encoding of "Save" command on this page. This is complete command (best without entity encoding):

echo -e '\x2Helo folks\t!\r' | sed "y/\x0\x1\x2\x3\x4\x5\x6\x7\x8\x9\xA\xB\xC\xD\xE\xF\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F\x20/&#9216;&#9217;&#9218;&#9219;&#9220;&#9221;&#9222;&#9223;&#9224;&#9225;&#9226;&#9227;&#9228;&#9229;&#9230;&#9231;&#9232;&#9233;&#9234;&#9235;&#9236;&#9237;&#9238;&#9239;&#9240;&#9241;&#9242;&#9243;&#9244;&#9245;&#9246;&#9247;&#9248;/"


/bin/echo -e '\002Hello, Folks\t!\r' | perl -pwle 'use v5.14; s/([\N{U+0000}-\N{U+0020}])/chr(9216+ord($1))/ge;'
2014-06-30 01:45:40
User: scruss
Functions: perl

Converts control codes and spaces (ASCII code ≤ 32) to visible Unicode Control Pictures, U+2400 ? U+2420. Skips \n characters, which is probably a good thing.

puppet cert -la
echo -e "a\na\nb\nc\nd" | awk '{x[$0]++}END{for (z in x){if(x[z]==1){print z}}}'
for a in $(find . -maxdepth 1 -name "*.mp4" -type f -printf "%f\n" | rev | cut -d '.' -f2- | rev | sort -u); do if [ ! -f "$a.mp3" ]; then avconv -i "$a."* -vn -ab 128 "$a.mp3"; fi done
2014-06-27 05:13:53
User: adanisch
Functions: cut find rev sort

Good for when you download youtube videos and want the mp3 for your mp3 player.

aws ec2 describe-snapshots --filter 'Name=volume-id,Values=vol-abcd1234' | jq '.[]|max_by(.StartTime)|.SnapshotId'
2014-06-26 20:26:23
User: thatinstant
Tags: aws EC2 jq elb

Uses the python-based AWS CLI (https://aws.amazon.com/cli/) and the JSON query tool, JQ (https://stedolan.github.io/jq/)