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.

If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

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.

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

2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.
Hide

Tags

Hide

Functions

Hide

Credits

Site by David Winterbottom (user root).

Commands using uniq from sorted by
Terminal - Commands using uniq - 192 results
cat /var/log/nginx/access.log | grep -oe '^[0-9.]\+' | perl -ne 'system("geoiplookup $_")' | grep -v found | grep -oe ', [A-Za-z ]\+$' | sort | uniq -c | sort -n
2012-05-08 13:28:25
User: theist
Functions: cat grep perl sort uniq
Tags: sort uniq geoip
-1
Up
Down
Per country GET report, based on access log. Easy to transform to unique IP

Per country GET report, based on access log. Easy to transform to unique IP

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
for a in $(find . -xdev -type f -printf '%i\n'|sort|uniq -d);do find . -xdev -inum $a -printf '%s %i %m %n %U %G %AD %Ar %p\n';done|sort -n|awk '{if(x!=$2){print "---"};x=$2;print $0}'
2012-04-09 12:52:07
User: knoppix5
Functions: awk find sort uniq
0
Up
Down
Sort by size all hardlinked files in the current directory (and subdirectories)

The listing will be nice separated with dashes in chunks of identical files.

Output format:

Size Inode Mode Count_of_identical_files UID GID Date Time Path/Filename

Show sample output | Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
find . -type f -print0 | xargs -0 -n1 md5sum | sort -k 1,32 | uniq -w 32 -d --all-repeated=separate | sed -e 's/^[0-9a-f]*\ *//;'
2012-04-03 07:03:09
User: hogofogo
Functions: find md5sum sed sort uniq xargs
0
Up
Down
Print duplicate files
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
history | awk '{print $2}' | awk 'BEGIN {FS="|"}{print $1}' | sort | uniq -c | sort -nr | head
2012-04-03 06:33:47
User: hogofogo
Functions: awk sort uniq
0
Up
Down
Top 10 commands used
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
find /some/path -type f -and -printf "%f\n" | egrep -io '\.[^.]*$' | sort | uniq -c | sort -rn
2012-04-02 19:25:35
User: kyle0r
Functions: egrep find sort uniq
Tags: uniq ls grep
0
Up
Down
list unique file extensions recursively for a path, include extension frequency stats

the

find -printf "%f\n" prints just the file name from the given path. This means directory paths which contain extensions will not be considered.
Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
head -n1 nation.tbl | sed 's/\(.\)/\1\n/g' | sort | uniq -c | grep \| | awk '{ print $1 }'
2012-03-03 12:35:58
User: maarten
Functions: awk grep head sed sort uniq
0
Up
Down
Count Number of Columns in TPC-H table-file (or any pipe seperated file
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
cat z.log | cut -d ':' -f1,2 | uniq -c
2012-02-28 17:29:46
User: hute37
Functions: cat cut uniq
Tags: uniq
0
Up
Down
Count loglines by time (minute)

depends on date format locale ...

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
cat z.log | cut -d ':' -f1 | sort | uniq | xargs -l1 -iFF echo 'echo FF $(cat z.log | grep -e "^FF" | grep -e Timeout | wc -l )' | bash
2012-02-28 17:25:14
User: hute37
Functions: cat cut echo grep sort uniq wc xargs
Tags: uniq xargs
0
Up
Down
Report summary of string occurrence by time period (hour) - alternate

useful to count events in logs

@see: http://www.commandlinefu.com/commands/view/10327/report-summary-of-string-occurrence-by-time-period-hour#comment

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
cat z.log | grep Timeout | cut -d ':' -f1 | sort | uniq -c
2012-02-28 17:22:17
User: hute37
Functions: cat cut grep sort uniq
Tags: uniq
0
Up
Down
Report summary of string occurrence by time period (hour)

useful to count events in logs

Show sample output | Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
sed -e 's/[;|][[:space:]]*/\n/g' .bash_history | cut --delimiter=' ' --fields=1 | sort | uniq --count | sort --numeric-sort --reverse | head --lines=20
2012-02-17 23:34:16
User: WissenForscher
Functions: cut head sed sort uniq
Tags: bash sort sed uniq
1
Up
Down
Top 20 commands in your bash history
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
awk -F: '{print $3}' /etc/passwd | sort |uniq -d
2012-01-17 11:16:35
User: ultips
Functions: awk sort uniq
Tags: uniq duplicate uid /etc/passwd
0
Up
Down
Find duplicate UID in /etc/passwd

Detect duplicate UID in you /etc/passwd (or GID in /etc/group file).

Duplicate UID is often forbidden for it can be a security breach.

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
find . -type f -exec md5 '{}' ';' | sort | uniq -f 3 -d | sed -e "s/.*(\(.*\)).*/\1/"
2012-01-14 08:54:12
User: noahspurrier
Functions: find sed sort uniq
-1
Up
Down
Find Duplicate Files (based on MD5 hash) -- For Mac OS X

This works on Mac OS X using the `md5` command instead of `md5sum`, which works similarly, but has a different output format. Note that this only prints the name of the duplicates, not the original file. This is handy because you can add `| xargs rm` to the end of the command to delete all the duplicates while leaving the original.

Comments (3) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
history | sed -e 's/^sudo //' | awk '{print $2}' | sort | uniq -c | sort -rn | head
2012-01-07 22:29:54
User: bibe
Functions: awk sed sort uniq
-2
Up
Down
Rank top 10 most frequently used commands

I make an extensive use of sudo, so I had to exclude the sudo part of the command history

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
history | awk '{print $2}' | sort | uniq -c | sort -rn | head
2012-01-05 22:23:25
User: ken_fallon
Functions: awk sort uniq
8
Up
Down
Rank top 10 most frequently used commands
Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
history | cut -c8- | sort | uniq -c | sort -rn | head
2012-01-05 15:28:09
User: evandrix
Functions: cut sort uniq
7
Up
Down
Rank top 10 most frequently used commands
Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
mysql -u root -p -N -e"show processlist\G;" | egrep "Host\:" | awk -F: '{ print $2 }' | sort | uniq -c
2011-12-22 09:04:07
User: zuck
Functions: awk egrep sort uniq
Tags: mysql
0
Up
Down
Calculating number of Connection to MySQL
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
mysql -u root -p -e"show processlist;"|awk '{print $3}'|awk -F":" '{print $1}'|sort|uniq -c
2011-12-22 05:37:36
User: prasadwani
Functions: awk uniq
Tags: mysql
0
Up
Down
Calculating number of Connection to MySQL

This command will help you to find how many number of connection are made to given mysql and what are the different hosts connected to it with number of connection they are making.

Show sample output | Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
grep -R Subject /var/spool/exim/input/ | sed s/^.*Subject:\ // | sort | uniq -c | sort -n > ~/email_sort.$(date +%m.%d.%y).txt
2011-11-24 14:13:29
User: unixmonkey27702
Functions: date grep sed sort uniq
0
Up
Down
Sort and count subjects of emails stuck in Exim queue
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
cat /file/way/somelogforexample | grep -o "[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}" | sort -n | uniq -c | sort -n
2011-10-27 17:45:09
User: cirno
Functions: cat grep sort uniq
0
Up
Down
Cat(print) and sort all IPs from file

Very useful for logs

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
curl http://www.cpan.org/modules/01modules.index.html |awk '{print $1}'|grep -v "<"|sort|uniq -c|grep -v " +[0-9] "
2011-10-18 16:03:54
User: dinomite
Functions: awk grep uniq
1
Up
Down
List the popular module namespaces on CPAN

Grabs the complete module list from CPAN, pulls the first column, ditches html lines, counts, ditches small namespaces.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
tshark -r data.pcap -R "ip.addr==192.168.1.2 && ip.addr==64.12.24.50 && aim" -d tcp.port==443,aim -T fields -e "aim.buddyname" |sort |uniq -c
2011-10-11 15:38:26
User: anhpht
Functions: sort uniq
0
Up
Down
Print out buddy name (aim) which has been capture in pcap
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
tshark -r data.pcap -R "ip.src==192.168.1.2" -T fields -e "ip.dst" |sort |uniq -c
2011-10-11 15:32:17
User: anhpht
Functions: sort uniq
0
Up
Down
Print all connections of a source IP address in pcap
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
dups() { sort "$@" | uniq -d; }
2011-10-04 16:46:00
User: bartonski
Functions: sort uniq
-3
Up
Down
shell function to find duplicate lines in a series of files or in stdin
Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
netstat -tn | awk 'NR>2 {print $6}' | sort | uniq -c | sort -rn
2011-09-12 23:29:39
User: evandrix
Functions: awk netstat sort uniq
8
Up
Down
Quick network status of machine

credit to tumblr engineering blog @ http://engineering.tumblr.com/

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
svn log -r{2011-08-01}:HEAD|awk '$14 ~/line/ {print $3}'|sort|uniq -c
2011-09-01 07:58:54
User: sangnoir
Functions: awk uniq
0
Up
Down
List svn commits by user for a date range

My script lists all users & the number of commits they made in the period, sorted alphabetically. To sort by number of commits, append a '|sort' to the end of the command. The script depends on the output format of svn log - original command didn't work for me because the string 'user' was not appearing in my output

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate