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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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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 - 12,392 results
oggenc --tracknum='track' track.cdda.wav -o 'track.ogg'
cdparanoia -B
2009-07-29 07:56:12
User: hemanth
Functions: cdparanoia

Rip audio tracks from CD to wav files in current dir

alias vi='emacsclient -n'
2009-07-29 06:18:40
User: freestyler
Functions: alias

add (server-start) in .emacs

svn ls -R | egrep -v -e "\/$" | xargs svn blame | awk '{print $2}' | sort | uniq -c | sort -r
2009-07-29 02:10:45
User: askedrelic
Functions: awk egrep ls sort uniq xargs
Tags: svn count

I'm working in a group project currently and annoyed at the lack of output by my teammates. Wanting hard metrics of how awesome I am and how awesome they aren't, I wrote this command up.

It will print a full repository listing of all files, remove the directories which confuse blame, run svn blame on each individual file, and tally the resulting line counts. It seems quite slow, depending on your repository location, because blame must hit the server for each individual file. You can remove the -R on the first part to print out the tallies for just the current directory.

find . -iname '*filename*.doc' | { while read line; do antiword "$line"; done; } | grep -C4 search_term;
2009-07-28 15:49:58
User: Ben
Functions: find grep read

Find Word docs by filename in the current directory, convert each of them to plain text using antiword (taking care of spaces in filenames), then grep for a search term in the particular file.

(Of course, it's better to save your data as plain text to make for easier grepping, but that's not always possible.)

Requires antiword. Or you can modify it to use catdoc instead.

knock <host> 3000 4000 5000 && ssh -p <port> [email protected] && knock <host> 5000 4000 3000
2009-07-28 14:08:01
User: din7
Functions: ssh

Knock on ports to open a port to a service (ssh for example) and knock again to close the port. You have to install knockd.

See example config file below.


logfile = /var/log/knockd.log


sequence = 3000,4000,5000

seq_timeout = 5

command = /sbin/iptables -A INPUT -i eth0 -s %IP% -p tcp --dport 22 -j ACCEPT

tcpflags = syn


sequence = 5000,4000,3000

seq_timeout = 5

command = /sbin/iptables -D INPUT -i eth0 -s %IP% -p tcp --dport 22 -j ACCEPT

tcpflags = syn

buffer () { tty -s && return; tmp=$(mktemp); cat > "${tmp}"; if [ -n "$1" ] && ( ( [ -f "$1" ] && [ -w "$1" ] ) || ( ! [ -a "$1" ] && [ -w "$(dirname "$1")" ] ) ); then mv -f "${tmp}" "$1"; else echo "Can't write in \"$1\""; rm -f "${tmp}"; fi }
2009-07-27 20:21:15
User: Josay
Functions: cat echo mv rm tty
Tags: redirection

A common mistake in Bash is to write command-line where there's command a reading a file and whose result is redirected to that file.

It can be easily avoided because of :

1) warnings "-bash: file.txt: cannot overwrite existing file"

2) options (often "-i") that let the command directly modify the file

but I like to have that small function that does the trick by waiting for the first command to end before trying to write into the file.

Lots of things could probably done in a better way, if you know one...

cat 1.mp3 2.mp3 > combined.mp3
2009-07-27 18:39:44
User: scottix
Functions: cat

This just combines multiple mp3's into one mp3 file. Basically it is a easy join for mp3's

ldapsearch -LLL -H ldap://${HOST}:389 -b 'DC=${DOMAIN},DC=${TLD}' -D '${USER}' -w 'password' objectclass=* -E pr=2147483647/noprompt

That command bypass the entry limit specifing page results size, when the search arrive to the limit ldapsearch magically reiterate it from the last entry.

man -P cat ls > man_ls.txt
2009-07-27 13:09:24
User: alvinx
Functions: cat ls man

Output manpage as plaintext using cat as pager: man -P cat commandname

And redirect its stdout into a file: man -P cat commandname > textfile.txt

Example: man -P cat ls > man_ls.txt

vmap <c-a> y:$<CR>o<Esc>map<Esc>:'a,$!awk '{sum+=$0}END{print "SUM:" sum}'<CR>dd'>p
find -name '*oldname*' -print0 | xargs -0 rename 's/oldname/newname/'
2009-07-27 00:44:06
Functions: find rename xargs

This is better than doing a "for `find ...`; do ...; done", if any of the returned filenames have a space in them, it gets mangled. This should be able to handle any files.

Of course, this only works if you have rename installed on your system, so it's not a very portable command.

for i in `find -name '*oldname*'`; do "mv $i ${i/oldname/newname/}"; done
2009-07-26 21:58:16
User: 0x89

no grep, no perl, no pipe.

even better in zsh/bash4:

for i in **/*oldname*; do "mv $i ${i/oldname/newname/}"; done

No find, no grep, no perl, no pipe

for f in *.rar;do unrar e ?$f?;done
sudo wget -c "http://nmap.org/dist/nmap-5.00.tar.bz2" && bzip2 -cd nmap-5.00.tar.bz2 | tar xvf - && cd nmap-5.00 && ./configure && make && sudo make install
2009-07-26 11:36:53
User: hemanth
Functions: bzip2 cd make sudo tar wget

Just copy and paste the code in your terminal.

Note : sudo apt-get for debian versions , change as per your requirement .

Source : www.h3manth.com

find public_html/stuff -type d -exec chmod 755 {} + -or -type f -exec chmod 644 {} +
2009-07-26 11:10:10
User: recursiverse
Functions: chmod find

Good for fixing web permissions. You might also want to do something like this and skip files or directories that begin with a period:

find public_html/stuff -not -name ".*" \( -type d -exec chmod 755 {} + -o -type f -exec chmod 644 {} + \)

...or include a special case for scripts:

find public_html/stuff -type d -exec chmod 755 {} + -or -type f -name "*.pl" -exec chmod 755 {} + -or -exec chmod 644 {} +
install -o user -g group -m 0700 -d /path/to/newdir
man perlcheat | col -b > perlcheat.txt
find . *oldname* | grep oldname | perl -p -e 's/^(.*)(oldname)(.*$)/mv $1$2$3 $1newname$3/' | sh
complete -W "$(echo $(grep '^ssh ' .bash_history | sort -u | sed 's/^ssh //'))" ssh
2009-07-25 23:07:25
User: 0x89

Stop tormenting the poor animal cat. See http://sial.org/howto/shell/useless-cat/.



sort | uniq


sort -u
ifconfig | awk -F':| +' '/ddr:/{print $4}'
2009-07-25 22:51:08
User: 0x89
Functions: awk ifconfig
Tags: Linux ifconfig

and, a lot uglier, with sed:

ifconfig | sed -n '/inet addr:/s/[^:]\+:\(\S\+\).*/\1/p'


Wanted to be shorter than the perl version. Still think that the perl version is the best..

2009-07-25 07:13:40
User: bigeasy
Functions: g++
Tags: vim

In edit mode, toggle the case of a single word under the cursor in vim.

DD=`cat /etc/my.cnf | sed "s/#.*//g;" | grep datadir | tr '=' ' ' | gawk '{print $2;}'` && ( cd $DD ; find . -mindepth 2 | grep -v db\.opt | sed 's/\.\///g; s/\....$//g; s/\//./;' | sort | uniq | tr '/' '.' | gawk '{print "CHECK TABLE","`"$1"`",";";}' )
2009-07-25 03:42:31
User: atcroft
Functions: cd find gawk grep sed sort tr uniq

This command will generate "CHECK TABLE `db_name.table_name` ;" statements for all tables present in databases on a MySQL server, which can be piped into the mysql command. (Can also be altered to perform OPTIMIZE and REPAIR functions.)

Tested on MySQL 4.x and 5.x systems in a Linux environment under bash.

svcadm disable gdm
2009-07-25 02:32:46
Functions: disable

On Solaris 10 you used dtconfig -d to achieve this. The command will disable X and your system will now boot to a text console.