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commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.


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Universal configuration monitoring and system of record for IT.
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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:

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Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

All commands from sorted by
Terminal - All commands - 12,354 results
cat /proc/meminfo
cd $(ls -ltr|grep ^d|head -1|sed 's:.*\ ::g'|tail -1)
2011-08-10 03:39:35
Functions: cd grep head ls sed tail
-1

Replace the head -1 with head -n that is the n-th item you want to go to.

Replace the head with tail, go to the last dir you listed.

You also can change the parameters of ls.

find -type f | xargs ls -1tr
$ssh-copy-id [email protected]
sudo urlsnarf -i wlan0
cat large.xml | xclip
2009-07-08 16:30:07
User: copremesis
Functions: cat
-1

avoid mouse abuse and the constant struggle of balancing scroll velocity ... not to mention that burning sensation in your upper right shoulder ....

ssh-keygen [email protected]
parallel -a <(seq 0 20) mkdir /tmp/dir1/{}
echo lowercaseword | tr '[a-z]' '[A-Z]'
rename s/ .php/ .html/ *.html
hashalot -s salt -x sha256 <<<"test"
2010-11-30 19:32:29
User: vayn
Tags: hash
-1

It's inspired by Generate MD5 hash for a string() [ http://goo.gl/ObCrl ], you need to install hashalot(very small) first. Salt is not necessary.

There is an optional command:

sha256 -s salt -x <<<"test"
mtr google.com
2012-02-19 22:27:48
User: d_voge
-1

You need to have mtr installed on your host.

alias mplayer='mplayer -stop-xscreensaver'
host google.com|awk '{print $NF}'
ggdG
cat /dev/sda | pv -r > /dev/null
2011-01-23 22:58:56
User: kerim
Functions: cat
-1

Change your drive letter as you wish.

Using pv command for speed detect.First of all you must install pv command for usage.

http://www.bayner.com/

[email protected]

find . -type f -iname '*.java.orig' -delete
find . -printf "%T@ %p\n" | sed -e 1d | while read ts fn; do ts=${ts%.*}; if [ $ts -ge ${gts:-0} ]; then gts=$ts; echo `date -d @$gts` $fn; fi; done
:%s/^V^M//g
2009-08-19 11:59:22
User: slim
-1

Whereas ^V is CTRL-V.

converts a dos file to unix by removing 0x13 characters

ifconfig eth0 | perl -ne 'print $1 if m/addr:((?:\d+\.){3}\d+)/'
makepasswd --char=32
2010-09-29 06:01:32
User: zed
-1

A more robust password creation utility

# Create passwords in batch

makepasswd --char=32 --count=10

# To learn more about the options you can use

man makepasswd
for I in `find . -name "*.php"`; do sed -i "s/old name/new name/g" $I; done
2009-02-16 17:09:09
User: ruedu
Functions: sed
-1

So you have a web site and you've plastered your significant other's name all over it. But you broke up with them and have some new love in your life. How do you find all those instances of their name and replace them?

rhost() { if [[ $1 =~ ^[0-9]+$ ]]; then sed -i "$1"d ${HOME}/.ssh/known_hosts; else echo "rhost [n]"; fi }
2013-08-01 21:10:34
User: lowjax
Functions: echo sed
-1

Quickly remove the conflicting line (key) from current users known_hosts file when there is an SSH host conflict. Very nice when you get tired of writing out full commands. Ideally you would place this into your .bash_profile

Usage: rhost [n]

Example: rhost 33 (removes line 33 from ~/.ssh/known_hosts)

Function assumes the $HOME exists, you could alternatively use "~/.ssh/known_hosts"

Mac OSX likes a space for sed -i "$1" d

curl -s http://www.last.fm/user/$LASTFMUSER | grep -A 1 subjectCell | sed -e 's#<[^>]*>##g' | head -n2 | tail -n1 | sed 's/^[[:space:]]*//g'