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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

Commands by sharfah from sorted by
Terminal - Commands by sharfah - 46 results
pwdx pid
head -$(($RANDOM % $(wc -l < file.txt) +1 )) file.txt | tail -1
find . -type f ! -name "*html"
echo string | tr '[:lower:]' '[:upper:]'
history -c
touch -amct [[CC]YY]MMDDhhmm[.ss] FILE
2009-05-27 14:33:22
User: sharfah
Functions: touch
1

-a for access time, -m for modification time, -c do not create any files, -t timestamp

ssh -C -X [email protected] gui_command
2009-05-21 17:52:24
User: sharfah
Functions: ssh
-2

Run GUI apps on another machine remotely through SSH.

-C is for data compression and -X enables X11 forwarding.

getconf ARG_MAX
2009-05-21 14:27:35
User: sharfah
Functions: getconf
1

Get max number of arguments that can be accepted by the exec() system call.

find . -name "*.jar" | while read file; do echo "Processing ${file}"; jar -tvf $file | grep "Foo.class"; done
cat /etc/SuSE-release
2009-05-20 17:28:12
User: sharfah
Functions: cat
Tags: SuSE
-3

Displays SuSE release information

unset TMOUT
2009-05-20 14:57:50
User: sharfah
Functions: unset
7

Unset TMOUT or set it to 0 in order to prevent shell autologout. TMOUT is the number of seconds after which the present shell will be killed if it has been idle for that long.

mvn -Dmaven.test.skip=true install
2009-05-20 12:55:10
User: sharfah
Tags: maven
-4

the maven.test.skip property can be added to other goals too.

mvn archetype:create -DgroupId=my.work -DartifactId=MyProject
2009-05-20 12:53:23
User: sharfah
Tags: maven
-5

This will create a new directory called MyProject with a pom.xml and the following tree structure:

MyProject

|-->pom.xml

|-->src

| |-->main

| | |-->java

| | | |-->my

| | | | |-->work

| | | | | |-->App.java

| |-->test

| | |-->java

| | | |-->my

| | | | |-->work

| | | | | |-->AppTest.java

who -b
2009-05-19 11:52:54
User: sharfah
Functions: who
16

Displays time of last system boot

sar -r
2009-05-19 11:47:38
User: sharfah
-2

Report memory and swap space utilization statistics e.g. memory free/used, swap free/used

kill -0 [pid]
2009-05-19 11:37:20
User: sharfah
Functions: kill
Tags: kill
5

Send signal 0 to the process. The return status ($?) can be used to determine if the process is running. 0 if it is, non-zero otherwise.

tar cvf - foodir | gzip > foo.tar.gz
2009-05-19 11:33:51
User: sharfah
Functions: gzip tar
Tags: tar gzip
-7

Where foodir is the directory you want to zip up.

gunzip < foo.tar.gz | tar xvf -
find . -type d -exec rmdir {} \;
2009-05-19 08:59:15
User: sharfah
Functions: find rmdir
Tags: find rm
1

Deletes empty directories and prints an error if directory is not empty.

TOM=`perl -w -e [email protected]=localtime(time+86400);printf "%d%.2d%.2d",$tom[5]+1900,$tom[4]+1,$tom[3];'`
2009-05-19 08:54:27
User: sharfah
Tags: perl
-2

Returns tomorrow's date in the format yyyyMMdd

YEST=`perl -w -e [email protected]=localtime(time-86400);printf "%d%.2d%.2d",$yest[5]+1900,$yest[4]+1,$yest[3];'`
2009-05-19 08:54:06
User: sharfah
Tags: perl
-2

Returns yesterday's date in the format yyyyMMdd