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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!

Top Tags



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

Commands using sed from sorted by
Terminal - Commands using sed - 1,160 results
grep -i s2enc /etc/vcac/server.xml | sed -e 's/.* password=\"\([^\"]*\)\".*/\1/' | xargs -n 1 vcac-config prop-util -d --p 2>/dev/null; echo
ps -ef | grep [p]mon | awk '{print $2}' | xargs -I {} ps eww {} | awk '{print $1 " " $5 " " $6 " " $0}' | sed 's/\(S*\) \(S*\) .*ORACLE_HOME/\1 \2/g' | cut -f1,2,3 -d" "
2017-03-24 18:45:40
User: Enirevlow
Functions: awk cut grep ps sed xargs

Show the executable that spawned the process and show the PID and ORACLE_HOME relative to the environment within which the process is running.

curl -s http://public-dns.info/nameserver/br.csv| cut -d, -f1 | xargs -i timeout 1 ping -c1 -w 1 {} | grep time | sed -u "s/.* from \([^:]*\).*time=\([^ ]*\).*/\2\t\1/g" | sort -n | head -n1
2017-02-02 12:00:38
User: glaudiston

http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.

sed 's/^\([^>.]\)/#\1/;s/^>>> //;s/^\.\.\./ /'
2016-12-06 15:23:02
User: miniker84
Functions: sed

Used to copy and paste a terminal buffer of a python interactive session into an editor

cat matching_files.txt | xargs sed -i '' "s/require('global-module')/require('..\/some-folder\/relative-module')/"
id <username> | sed s/' '/'\n'/g | sed s/,/',\n '/g | sed s/'('/' ('/g | sed s/uid/' uid'/g | sed s/gid/' gid'/g | sed s/=/' = '/g
find . -name '*.desktop' | sed s/[^/]*\.desktop$// | uniq -c | sort -g
2016-09-16 12:22:38
User: T4b
Functions: find sed sort uniq

In this case searches for where .desktop files are stored. The resulted is a sorted list of the top directories containing such files.

host -t srv _ldap._tcp | sed "s/.*[ ]\([^ ]*\)[.]$/\1/g" | xargs -i ping -c 1 {} | grep -E "(statistics|avg)" | sed "s/^--- \([^ ]*\).*/,\1:/g"|tr -d "\n" | tr "," "\n" | sed "1d;s|^\([^:]*\).*=[^/]*/\([^/]*\).*|\2\t\1|g" |sort -n
2016-09-02 03:26:29
User: glaudiston
Functions: grep host ping sed sort tr xargs
Tags: ldap

This command line detect ldap hosts, by mandatory dns entry, then ping them to detect response average. based on ping response average it sorts and print the faster server in first output line

tail -v -f $(php -i | grep "^[ \t]*error_log" | awk -F"=>" '{ print $2; }' | sed 's/^[ ]*//g')
2016-08-31 12:13:31
User: paulera
Functions: awk grep sed tail

Runs "php -i", filter the error_log location, then watches it using "tail"

$ sed "2s/$/ $(sed -n '4p' sound.desktop)/" sound.desktop
2016-08-23 02:50:31
User: pibarnas
Functions: sed

Using "", which allow bash commands to be interpreted by sed scripts, I've embedded a sed script in another sed substitution, in case, the 4th line of the file at the end of the second one.

gem install `ruby ./isuckat_ruby.rb 2>&1 | sed -e 's/.*find gem .//g' -e 's/ .*//g' | head -n 1`
2016-08-03 19:41:27
User: operat0r
Functions: head install sed

When bundle install sucks ...This runs isuckat_ruby.rb and when stderror matches find gem ' it will gem install what ever is missing ...

sed 'X{N;s/\n//;}' file.txt (where X is the current line)
2016-07-30 14:27:20
User: pibarnas
Functions: sed

N: On the current line, sed will display it on pattern space, plus a \n (new line); but

s/\n//: Will get rid of new line displayed on pattern space, joining the current line's end with the start of the next line

Useful in scripts.

sed '/INSERT INTO `unwanted_table`/d' mydb.sql > reduced.sql
2016-06-24 20:13:47
User: sudopeople
Functions: sed

Starting with a large MySQL dump file (*.sql) remove any lines that have inserts for the specified table. Sometimes one or two tables are very large and uneeded, eg. log tables. To exclude multiple tables you can get fancy with sed, or just run the command again on subsequently generated files.

touch files.txt; cat reorder_files.sh | while read line; do x=`echo $line | sed 's/touch \([a-z0-9\.]\+.*.pdf\);.*/\1/'`; echo $x >> files.txt ; done;
pkg update -nv | sed -n '/entire/{N;p;}'
2016-04-15 20:48:49
User: apaton
Functions: sed

Above example is upgrading Solaris from 11.1SRU20.0.5 to 11.2SRU15.0.5. Patches are not applied options "-nv" are for dryrun and verbose output.

echo Which way up? | flip.pl | cowsay | tac | sed -e "s,/,+,g" -e "s,\\\,/,g" -e "s,+,\\\,g" -e "s,_,-,g" -e "s,\^,v,g"
2016-04-08 11:41:44
User: mpb
Functions: echo sed tac

It's quite fun to invert text using "flip.pl" (ref: http://ubuntuforums.org/showthread.php?t=2078323 ).

Slightly more challenging is to flip a whole "cowsay". :-)

ss -t -o state established '( dport = :443 || dport = :80 )'|grep tcp|awk '{ print $5 }'|sed s/:http[s]*//g|sort -u|netcat whois.cymru.com 43|grep -v "AS Name"|sort -t'|' -k3
transfer() { basefile=$(basename "$1" | sed -e 's/[^a-zA-Z0-9._-]/-/g');curl --progress-bar --upload-file "$1" "https://transfer.sh/$basefile"|xsel --clipboard;xsel --clipboard ; }
2016-03-20 19:38:48
User: leftyfb
Functions: basename sed




access to the internet(http://transfer.sh)

This is an alias utilizing the transfer.sh service to make sharing files easier from the command line. I have modified the alias provided by transfer.sh to use xsel to copy the resulting URL to the clipboard.

The full modified alias is as follows since commandlinefu only allows 255 characters:

transfer() { if [ $# -eq 0 ]; then echo "No arguments specified. Usage:\necho transfer /tmp/test.md\ncat /tmp/test.md | transfer test.md"; return 1; fi if tty -s; then basefile=$(basename "$1" | sed -e 's/[^a-zA-Z0-9._-]/-/g'); curl --progress-bar --upload-file "$1" "https://transfer.sh/$basefile" |xsel --clipboard; else curl --progress-bar --upload-file "-" "https://transfer.sh/$1" |xsel --clipboard ; fi; xsel --clipboard; }

adb shell "screencap -p | base64" | sed 's/\r$//' | base64 -d | display
2016-02-07 18:46:35
User: T4b
Functions: sed

Dependencies on phone: adb access, screencap command, base64 command.

Dependencies on computer: adb, sed, base64, display (from imagemagick, but can substitute other image viewer which reads from stdin).

This should work around adb stupidies (i.e. that it replaces \n with \r\n) with base64.

sudo strace -e trace=network -p `pidof nginx | sed -e 's/ /,/g'`
2016-01-28 18:48:16
Functions: sed strace sudo

Nginx (and other webservers like Apache) can be awkward to trace. They run as root, then switch to another user once they're ready to serve web pages. They also have a "master" process and multiple worker processes.

The given command finds the process IDs of all Nginx processes, joins them together with a comma, then traces all of them at once with "sudo strace." System trace output can be overwhelming, so we only capture "networking" output.

TIP: to kill this complex strace, do "sudo killall strace".

Compare with a similar command: http://www.commandlinefu.com/commands/view/11918/easily-strace-all-your-apache-processes

get_iplayer --type=radio --channel "Radio 4 Extra" | grep : | awk '{ if ( NR > 1 ) { print } }'|sed 's/:.*//' |sed '$ d' > pidlist && while read p; do get_iplayer --get --fields=pid $p; done <pidlist && rm pidlist
2016-01-16 17:20:54
User: dunryc
Functions: awk grep read rm sed

use get_iplay to download all listed content from http://www.bbc.co.uk/radio4extra run every night to make sure no episodes are missed

git log --oneline | nl -v0 | sed 's/^ \+/&HEAD~/'
2015-11-23 21:35:57
User: flatcap
Functions: nl sed
Tags: git sed nl git-log

Print a git log (in reverse order) giving a reference relative to HEAD.

HEAD (the current revision) can also be referred to as HEAD~0

The previous revision is HEAD~1 then HEAD~2 etc.


Add line numbers to the git output, starting at zero:

... | nl -v0 | ...


Insert the string 'HEAD~' before the number using sed:

... | sed 's/^ \+/&HEAD~/'


Thanks to bartonski for the idea :-)

find <mydir> -type f -exec sed -i 's/<string1>/<string2>/g' {} \;
ls -1 | while read a; do mv "$a" `echo $a | sed -e 's/\ //g'`; done
echo ${IP} | sed "s/[0-9\.]//g"
2015-10-19 18:20:03
User: andregyn62
Functions: echo sed

This command validates if exist any character different in 0-255 and dot.

If any characters different is typed the error menssage is showing.