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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.




Commands using sed from sorted by
Terminal - Commands using sed - 1,070 results
git for-each-ref --sort='-authordate' --format='%(refname)%09%(authordate)' refs/heads | sed -e 's-refs/heads/--'
source <(egrep '^#define EX_.*' /usr/include/sysexits.h | sed -e 's/#define/declare -r/g' | sed 's/\//#/g' | sed -e 's/\s\{1,\}/ /g' | sed -e 's/ \([0-9]\)/\=\1/'g )
2012-09-21 13:30:37
User: fishdaemon
Functions: egrep sed

Use meaningful exit codes

change "source" to "cat" to view output instead of assigning

sed 1d foo.txt
cp foo.txt foo.txt.tmp; sed '$ d' foo.txt.tmp > foo.txt; rm -f foo.txt.tmp
2012-09-13 20:57:40
User: kaushalmehra
Functions: cp rm sed
Tags: sed unix

sed '$ d' foo.txt.tmp

...deletes last line from the file

top -n2 -d 0.5 | grep ^Cpu | sed 's/[[:alpha:]%]*//g' | awk 'NR == 2 {printf("%.2f\n",100-$5)}'
2012-09-06 12:56:26
User: wizzra
Functions: awk grep sed top

Get the current cpu % usage on your system.

sed -n -e "/^\[/h; /priority *=/{ G; s/\n/ /; s/ity=/ity = /; p }" /etc/yum.repos.d/*.repo | sort -k3n
2012-09-06 00:09:09
User: eddieb
Functions: sed sort

This probably only works without modifications in RHEL/CentOS/Fedora.

parcellite -c | sed 's/^/ /' | parcellite
2012-09-05 18:00:15
User: brandizzi
Functions: sed

This command takes the content of a Parcellite-managed clipboard manager and add one level of indentation to it. It may be useful to indent a block of code which will enter inside another, already indented one but I use it mostly to indent code I will post in Stack Overflow questions and answers.

lsmod | tail -n +2 | cut -d' ' -f1 | xargs modinfo | egrep '^file|^desc|^dep' | sed -e'/^dep/s/$/\n/g'
grep -H voluntary_ctxt /proc/*/status |gawk '{ split($1,proc,"/"); if ( $2 > 10000000 ) { printf $2 " - Process : "; system("ps h -o cmd -p "proc[3]) } }' | sort -nk1,1 | sed 's/^/Context Switches: /g'
2012-09-01 19:43:47
User: jperkster
Functions: gawk grep printf sed sort

This command will find the highest context switches on a server and give you the process listing.

od -An -N6 -tx1 /dev/urandom | sed -e 's/^ *//' -e 's/ */:/g' -e 's/:$//' -e 's/^\(.\)[13579bdf]/\10/'
2012-08-31 13:15:03
User: outly3r
Functions: od sed

- The last sed expression ensures the unicast/multicast bit is set to zero

- The greedy space replacements are for portability across UNIX seds (note there's TWO spaces and not just one, as this web shows, in s/^ */)

Q="Hello world"; GOOG_URL="http://www.google.com/search?q="; AGENT="Mozilla/4.0"; stream=$(curl -A "$AGENT" -skLm 10 "${GOOG_URL}\"${Q/\ /+}\"" | grep -oP '\/url\?q=.+?&amp' | sed 's/\/url?q=//;s/&amp//'); echo -e "${stream//\%/\x}"
sed -e :a -e '$!N;s/\n/ /;ta'
awk '{print $1}' /proc/net/dev|grep :|sed "s/:.*//g"
sed 's/#.*//' /etc/fstab | column -t
sudo file -bs /dev/sda | sed -e 's/.*partition 1\(.*\) code offset.*/partition 1\1/g' -e 's/\(.\);/\1\n/g'
(cat ~/.bash_history;U='curl -s www.commandlinefu.com';$U/users/signin -c/tmp/.c -d'username=<USER>&password=<PASS>&submit=1'|$U/commands/favourites/json -b/tmp/.c|grep -Po 'nd":.*?[^\\]",'|sed -re 's/.*":"(.*)",/\1/g')>~/.h;HISTFILE=~/.h bash --login
2012-08-17 12:31:51
User: xenomuta
Functions: bash cat grep sed

This makes your commandlinefu.com's favorites appear as most recent commands in your history.

sudo apt-get remove $(dpkg -l|awk '/^ii linux-image-/{print $2}'|sed 's/linux-image-//'|awk -v v=`uname -r` 'v>$0'|sed 's/-generic*//'|awk '{printf("linux-headers-%s\nlinux-headers-%s-generic*\nlinux-image-%s-generic*\n",$0,$0,$0)}')
2012-08-15 10:02:12
User: mtron
Functions: awk sed sudo

Remove old kernels (*-generic and *-generic-pae) via apt-get on debian/ubuntu based systems. Tested on ubuntu 10.04 - 12.04.

buf () { oldname=$1; if [ "$oldname" != "" ]; then datepart="$(date +%Y-%m-%d).bak"; firstpart=`echo $oldname | cut -d "." -f 1`; newname=`echo $oldname | sed s/$firstpart/$firstpart.$datepart/`; cp -iv ${oldname} ${newname}; fi }
2012-08-15 08:31:44
User: juliushibert
Functions: cp cut sed

Appends the input file with the date format YYYY-MM-DD.bak. Also runs silently if you remove the -v on the cp at the end of the function.

echo 00:29:36 | sed s/:/*60+/g | bc
cat index.html | grep -o '<a .*href=.*>' | sed -e 's/<a /\n<a /g' | sed -e 's/<a .*href=['"'"'"]//' -e 's/["'"'"'].*$//' -e '/^$/ d'
for i in $(tmux list-windows -F '#{window_index}'); do panenames=$(tmux list-panes -t $i -F '#{pane_title}' | sed -e 's/:.*$//' -e 's/^.*@//' | uniq); windowname=$(echo ${panenames} | sed -e 's/ /|/g'); tmux rename-window -t $i $windowname; done
2012-08-03 01:43:51
User: mrfixit42
Functions: echo sed
Tags: tmux byobu

*I run this with byobu as as a custom status bar entry that runs every 10 seconds by putting it in a script here:


There's no output to stdout, so nothing is displayed on the status bar.

*Presumes that #{pane_title} is set to the hostname or prompt containing the host name. In my case, it's in this format:


The sed commands may need to be modified if your pane_title is different.

*If you want to strip out a common part of a hostname, add the following before '| uniq'

-e 's/[COMMON PART]//'

I use that to strip out the domain of the servers I connect to, leaving the subdomain.

egrep_escape() { echo "$1" |sed -re 's/([\\.*+?(|)^$[])/\\\1/g' -e 's/\{/[{]/g'; }
2012-08-02 16:54:43
User: regnarg
Functions: echo sed
Tags: grep escape

Use if you want to include untrusted literal strings in your grep regexes.

I use it to list all mounts below a directory:

dir=/mnt/gentoo; cat /proc/mounts |awk '{print $2}' |egrep "^$(egrep_escape "$dir")(/|$)"






Works even if $dir contains dangerous characters (e.g. comes from a commandline argument).

dmesg -T|sed -e 's|\(^.*'`date +%Y`']\)\(.*\)|\x1b[0;34m\1\x1b[0m - \2|g'
2012-07-31 22:21:07
User: jlaunay
Functions: dmesg sed

Use sed to color the output of a human-readable dmesg output

egrep 'ServerAlias|ServerName' /etc/apache2/sites-enabled/*.conf | awk '{printf "%s\t%s\n",$2,$3}' | sed 's/www.//' | sort | uniq
2012-07-25 12:51:15
User: staeff
Functions: awk egrep sed sort

Get a list of all the unique hostnames from the apache configuration files. Handy to see what sites are running on a server. When i saw the command i had some ideas to make it shorter. Here is my version.

eselect bashcomp enable --global $(eselect bashcomp list | sed -e 's/ //g'| cut -d']' -f2 | sed -e 's/\*//'| xargs)