Hide

What's this?

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.

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

OpenID
or
Sign in Register

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Universal configuration monitoring and system of record for IT.
Hide

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

Hide

News

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!
Hide

Top Tags


awk, bash, curl, find, grep, Linux, sed
Hide

Functions

Hide

Credits

Maintained by Jon H.

Site originally by David Winterbottom (user root).

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 gawk from sorted by
Terminal - Commands using gawk - 35 results
equery s | sed 's/(\|)/ /g' | sort -n -k 9 | gawk '{print $1" "$9/1048576"m"}'
2009-07-30 01:12:10
User: Alanceil
Functions: gawk sed sort
Tags: size Gentoo packets
0
Up
Down
Gentoo: Get the size of all installed packets, sorted

On a Gentoo system, this command will tell you which packets you have installed and sort them by how much space they consume. Good for finding out space-hogs when tidying up disk space.

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
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
-1
Up
Down
Generate CHECK TABLE statements for all MySQL database tables on a server

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.

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
for x in `seq -w 1 30`; do sar -b -f /var/log/sa/sa$x | gawk '/Average/ {print $2}'; done
2009-06-17 02:46:52
User: unixmonkey4319
Functions: gawk
Tags: awk sysstat
0
Up
Down
Extract the daily average number of iops

You need sysstat and gawk for this to work.

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
hddtemp /dev/sda /dev/sdb /dev/hda /dev/hdb | gawk '{print $NF}' | perl -n -e '$_ =~ s/(\d+)/print "$1 "/eg }{ print "\n"'
2009-05-20 16:01:58
User: microft
Functions: gawk perl
0
Up
Down
get the list of temps for your hard-drives

get a list of temps of your hard-drives.

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
psql -U postgres -lAt | gawk -F\| '$1 !~ /^template/ && $1 !~ /^postgres/ && NF > 1 {print $1}'
2009-05-15 14:33:50
User: lv4tech
Functions: gawk
3
Up
Down
List all PostgreSQL databases. Useful when doing backups
Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
screen -ls | grep pts | gawk '{ split($1, x, "."); print x[1] }' | while read i; do gnome-terminal -e screen\ -dx\ $i; done
2009-04-22 10:36:39
User: microft
Functions: gawk grep read screen
3
Up
Down
connect to all screen instances running

connects to all the screen instances running.

Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
find . -type f -print0 | xargs -r0 stat -c %Y\ %n | sort -rn | gawk '{sub(/.\//,"",$2); print $2}' > /tmp/playlist.m3u
2009-03-04 16:41:02
User: microft
Functions: find gawk sort stat xargs
3
Up
Down
Generate a playlist of all the files in the directory, newer first

I use this to generate a playlist with all the podcasts I listen to.

Ordered from most recent to older.

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
mysql -u uname dbname -e "show tables" | grep -v Tables_in | grep -v "+" | gawk '{print "optimize table " $1 ";"}' | mysql -u uname dbname
2009-02-05 14:54:22
User: dlamotte
Functions: gawk grep uname
2
Up
Down
command line to optimize all table from a mysql database
Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
mysql -u uname dbname -e "show tables" | grep -v Tables_in | grep -v "+" | gawk '{print "drop table " $1 ";"}' | mysql -u uname dbname
2009-02-05 14:53:09
User: dlamotte
Functions: gawk grep uname
-1
Up
Down
command line to drop all table from a databse
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
sudo lsof | awk '{printf("%s %s %s\n", $1, $3, $NF)}' | grep -v "(" | sort -k 4 | gawk '$NF==prv{ct++;next} {printf("%d %s\n",ct,$0);ct=1;prv=$NF}' | uniq | sort -nr
2009-02-05 14:18:57
User: bpfx
Functions: awk gawk grep sort sudo uniq
2
Up
Down
To find the count of each open file on a system (that supports losf)
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate