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

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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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  • » 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 - 12,372 results
ioreg -l -p IODeviceTree | grep -o EFI[0-9]. && system_profiler SPSoftwareDataType |grep 64
perl -le 'print join $/, @INC'
2009-09-22 22:18:35
User: chuckr
Functions: join perl
0

This will show where your Perl installation is looking for modules.

echo start > battery.txt; watch -n 60 'date >> battery.txt'
2009-10-18 07:00:26
User: m33600
Functions: echo watch
0

Fully recharge your computer battery and start this script.

It will create or clean the file named battery.txt, print a start on it and every minute it will append a time stamp to it.

Batteries last few hours, and each hour will have 60 lines of time stamping. Really good for assuring the system was tested in real life with no surprises.

The last time stamp inside the battery.txt file is of interest. It is the time the computer went off, as the battery was dead!

Turn on your computer after that, on AC power of course, and open battery.txt. Read the first and last time stamps and now you really know if you can trust your computer sensors.

If you want a simple line of text inside the battery.txt file, use this:

watch -n 60 'date > battery.txt'

The time of death will be printed inside

purple-remote "setstatus?status=Available&message=Checking libpurple"
xmms2 info $(xmms2 mlib search '<query>' | sed -ne 's/^00*\([1-9][0-9]*\).*$/\1/p') | awk -F' = ' '$1~/ url$/{print$2}'
pkill -f <process name>
2010-06-19 02:36:31
User: eikenberry
Tags: kill ps killall
0

Using -f treats the process name as a pattern so you don't have to include the full path in the command. Thus 'pkill -f firefox' works, even with iceweasel.

cd $(find -inum inode_no)
2010-09-25 06:04:32
User: emacs
Functions: cd find
0

First use ls -i to list files and directories with their inode number

Then if you want to change to one of the directories, replace inode_no with its inode then execute the command

sed -i '$a\FOOBAR' *
tag() { local t="$HOME/tags/$1"; [ -d $t ] || mkdir -p $t; shift; local i; for i in $*; do ln -s $(readlink -f $i) $t;done}
2012-02-10 15:43:02
Functions: ln mkdir readlink
0

shell function which allows you to tag files by creating symbolic links directories in a 'tags' folder.

The tag function takes a tag name as its first argument, then a list of files which take that tag. The directory $HOME/tags/tagname will then hold symbolic links to each of the tagged files. This function was modified from bartonski's (http://www.commandlinefu.com/commands/view/10216) inspired by tmsu (found at https://bitbucket.org/oniony/tmsu/wiki/Home) with readlink function by flxndn (http://www.commandlinefu.com/commands/view/10222).

Example:

tag dog airedale.txt .shizturc weimeraner.pl

This will create $HOME/tags/dog which contains symbolic links to airedale.txt .shizturc and weimeraner.pl

pdftk file.pdf dump_data output | grep -i Num
ip a s eth0 | awk -F"[/ ]+" '/inet / {print $3}'
watch -n1 iptables -vnL
fortune | cowsay -f sodomized-sheep
svn st | grep ^\? | awk '{print $2}' | xargs svn add
^[c (ctrl-v esc-c)
2009-03-18 15:15:24
User: angrox
0

Resets a scrambled terminal into its orignal state.

cat file | tee >> file
2009-07-30 07:34:03
User: GeckoDH
Functions: cat file tee
0

The command `cat file >> file` failes with the following error message:

cat: file: input file is output file

`tee` is a nice workaround without using any temporary files.

/bin/cp -n <from> <to>
vim `find . -iname '*.php'`
2011-05-11 01:19:28
User: wsams
Functions: vim
0

In this case, we'll be editing every PHP file from the current location down the tree.

You can show all the files in the vim buffer with :buffers which outputs something like,

:buffers

1 %a "./config/config.php" line 1

2 "./lib/ws-php-library.php" line 0

3 "./lib/css.php" line 0

4 "./lib/mysqldb.class.php" line 0

5 "./lib/config.class.php" line 0

6 "./lib/actions.php" line 0

Press ENTER or type command to continue

If you'd like to edit ./lib/mysqldb.class.php for example, enter :b4 anytime you're editing a file. You can switch back and forth.

sudo killall -HUP mDNSResponder
2012-05-15 18:33:51
User: Xeno
Functions: killall sudo
0

Purges DNS cache of OS X.

dscacheutil -flushcache does not work since OS X 10.7.

xclip -sel clip < ~/.ssh/id_rsa.pub
mdfind 'kMDItemFSCreationDate >= $time.this_month'
2012-11-13 12:50:51
User: peter4512
0

This uses spotlight indices to find files that have recently been added. Other options include underscore separated versions of: this week, this month, this

year; today, yesterday.

curl ip.appspot.com
ethtool -S eth0 | egrep "(drop|disc|err|fifo|buf|fail|miss|OOB|fcs|full|frags|hdr|tso).*: [^0]"
2014-07-15 05:27:34
User: suprjami
Functions: egrep
0

A grep against ethtool to look for common errors and packet loss statistics which network drivers report in their private data, which is queried with ethool -S. This is the current grep used in xsos (https://github.com/ryran/xsos), which I originally contributed and has been improved by the community over time.

pkgchk -l -p <full path to the file>
2009-07-04 08:22:11
User: sengork
Tags: solaris
0

Find which package a file belongs to on Solaris along with it's packaging system metadata.

watch -d 'ls -l'
2009-09-03 20:12:36
User: 0disse0
Functions: watch
Tags: watch stats
0

To highlight the difference between screen updates