All commands | commandlinefu.com

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

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

UpGuard checks and validates configurations for every major OS, network device, and cloud provider.

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:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)

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

Terminal - All commands - 12,418 results

dpkg-deb -x $debfile $extractdir; dpkg-deb -e $debfile $extractdir/DEBIAN;

2009-08-07 20:33:43

User: flokra

Tags: Debian dpkg packaging

Up
Down

complete extraction of a debian-package

extracts the debian-package $debfile to $extractdir, including all packaging-information. to repack the package, just type:

dpkg-deb -b $extractdir

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

sudo du -sh $(ls -d */) 2> /dev/null

2009-08-07 19:00:09

User: Code_Bleu

Functions: du ls sudo

Tags: disk usage

Up
Down

Get the size of all the directories in current directory

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

nslookup commandlinefu.com|sed 's/[^0-9. ]//g'|tail -n 1|awk -F " " '{print $2}'

2009-08-07 17:32:55

User: thundernode

Functions: awk nslookup sed tail

Up
Down

Get the ip registered to a domain on OpenWRT

I use this in a script on my openwrt router to check if my DynDNS needs to be updated, saves your account from being banned for blank updates.

ssh-copy-id [email protected]

2009-08-07 16:36:19

User: matthewbauer

Functions: ssh

Up
Down

Copy ssh keys to [email protected] to enable password-less ssh logins.

Same as original just no $ at start

Comments (6) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

dig commandlinefu.com | sed -nr 's/^[^;].*?\s([.0-9]{7,15})$/\1/ p'

2009-08-07 16:11:31

User: birnam

Functions: dig sed

Up
Down

gets the bare ip(s) of a domain

Strips the non-ip information from the dig output. Could be combined with "head -1" to ensure a single ip is returned. Useful for outputting as a variable for use in scripts.

VBoxManage list vms

2009-08-07 12:43:04

User: linuxrawkstar

Tags: virtualbox virtualization VBoxManage

Up
Down

Get a list of all your VirtualBox virtual machines by name and UUID from the shell

A similar command that lists only the currently running VMs is thus:

VBoxManage list runningvms

...the above showing a list of VMs by name and UUID in the same format as the "$ VBoxManage list vms" command

VBoxHeadless -s <name|uuid>

2009-08-07 12:36:32

User: linuxrawkstar

Tags: virtualbox virtualization VBoxHeadless

Up
Down

run a VirtualBox virtual machine without a gui

you can launch a VirtualBox VM from the command line using VBoxManage, but that invokes it in a gui environment.

If you want to just fire off your VM in the background, use VBoxHeadless as shown. To get the names and UUIDs of your VirtualBox VMs, type:

VBoxManage list

Comments (73) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

ips(){ for if in ${1:-$(ip link list|grep '^.: '|cut -d\ -f2|cut -d: -f1)};do cur=$(ifconfig $if|grep "inet addr"|sed 's/.*inet addr:$[0-9\.]*$.*/\1/g');printf '%-5s%-15s%-15s\n' $if $cur $(nc -s $cur sine.cluenet.org 128 2>/dev/null||echo $cur);done;}

2009-08-07 10:04:46

User: frozenfire

Functions: cut echo grep ifconfig link sed

Tags: Linux IP ip address

-3

Up
Down

Get internal and external IP addresses

Gets the internal and external IP addresses of all your interfaces, or the ones given as arguments

perl -ne 'split /,/ ; $a+= $_[3]; END {print $a."\n";}' -f ./file.csv

2009-08-07 09:35:52

User: ioggstream

Functions: perl

Tags: column CSV sum

Up
Down

Sum columns from CSV column $COL

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

randpw(){ < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo;}

2009-08-07 07:30:57

User: frozenfire

Functions: head tr

Tags: password random

Up
Down

Generate random password

Generates password consisting of alphanumeric characters, defaults to 16 characters unless argument given.

ab -n 9000 -c 900 localhost:8080/index.php

2009-08-07 07:19:40

User: amaymon

Tags: apache benchmark

Up
Down

benchmark web server with apache benchmarking tool

-n 9000 : Number of requests to perform for the benchmarking session

-c 900 : Number of multiple requests to perform at a time

cd `dirname $_`

2009-08-07 07:08:31

User: amaymon

Functions: cd

Tags: bash bash tricks

Up
Down

Go to parent directory of filename edited in last command

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

dd if=/dev/urandom count=200 bs=1 2>/dev/null | tr "\n" " " | sed 's/[^a-zA-Z0-9]//g' | cut -c-16

2009-08-07 06:32:55

User: amaymon

Functions: cut dd sed tr

Tags: dd sed cut tr

Up
Down

Generate Random Passwords

Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

cd !$:h

2009-08-07 00:37:08

User: lingo

Functions: cd

Tags: bash bash tricks

Up
Down

Go to parent directory of filename edited in last command

Uses the last argument of the last executed command, and gets the directory name from it.

Use $!:t for the filename alone, without the dirname.

for I in $(mysql -e 'show databases' -s --skip-column-names); do mysqldump $I | gzip > "$I.sql.gz"; done

2009-08-07 00:25:23

User: lingo

Functions: gzip

Up
Down

Backup all MySQL Databases to individual files

Comments (70) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

watch -n 1 nc localhost 80 '<<EOF GET / HTTP/1.1 Host: tux-ninja Connection: Close EOF'

2009-08-06 23:20:31

User: JustinHop

Functions: watch

Up
Down

Test http request every second, fancy display.

Use the command watch, which is really hard to pass nested quotes to, and insert newlines where they are supposed to go in the HTTP request. that is after 1.1 after the host and two newlines at the end before the EOF.

i use this all day

what? no support for HEREDOCs on commandlinefu's interface? need more fu.

cat files.txt | xargs tar -cv | tar -x -c $DIR/

2009-08-06 22:55:21

User: lingo

Functions: cat tar xargs

Tags: copy tar directories files list

Up
Down

Copy files from list with hierarchy

If you want certain files out of a directory hierarchy, this will copy just the listed files, but will create the directory hierarchy in the new location ($DIR/)

Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

ifconfig $devices | grep "inet addr" | sed 's/.*inet addr:$[0-9\.]*$.*/\1/g'

2009-08-06 21:43:22

User: matthewbauer

Functions: grep ifconfig sed

Tags: internal ip

Up
Down

Get your internal IP address and nothing but your internal IP address

Will return your internal IP address.

rm -d **/*(/^F)

2009-08-06 21:41:19

User: claytron

Functions: rm

Tags: find zsh glob

Up
Down

Delete empty directories with zsh

This command uses the recursive glob and glob qualifiers from zsh. This will remove all the empty directories from the current directory down.

The **/* recurses down through all the files and directories

The glob qualifiers are added into the parenthesis. The / means only directories. The F means 'full' directories, and the ^ reverses that to mean non-full directories. For more info on these qualifiers see the zsh docs: http://zsh.dotsrc.org/Doc/Release/Expansion.html#SEC87

Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

find . -name "-help" -exec mv {} help.txt \;

2009-08-06 20:43:30

User: petrohs

Functions: find mv

Tags: mv find;

-7

Up
Down

renombrar un archivo que inicia con guion

sudo snmptrap -m ALL -v 2c -c public trapserver "" UCD-DEMO-MIB::ucdDemoPublic SNMPv2-MIB::sysLocation.0 s "Just here"

2009-08-06 17:32:16

User: vutcovici

Functions: sudo

Up
Down

Send SNMP traps

Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

cp path/filename{,-$(date +%Y-%m-%d)}

2009-08-06 13:50:00

User: vutcovici

Functions: cp date

Up
Down

Create a backup of the file.

It will create a backup of the filename. The advantage is that if you list the folder the backups will be sorted by date. The command works on any unix in bash.

wget -O - http://checkip.dyndns.org|sed 's/[^0-9.]//g'

2009-08-06 12:47:32

User: thundernode

Functions: sed wget

-1

Up
Down

Get your external IP address

Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

fetch -q -o - http://ipchicken.com | egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}'

2009-08-06 11:57:44

User: spackle

Functions: egrep

Tags: Network grep regex fetch

-1

Up
Down

Get your external IP address

Same thing as above, just uses fetch and ipchicken.com

nmap -PN -d -p445 --script=smb-check-vulns --script-args=safe=1 IP-RANGES

2009-08-06 11:54:33

User: themoux

Up
Down

Conficker Detection with NMAP

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

‹ First < 396 397 398 399 400 > Last ›