All commands sorted by votes

All commands (14,187)

sorted by

Network Interfaces
This is sample output - yours may be different.
0

sudo ip addr show

olto · 2015-10-01 04:14:47 25
Replace VIM
This is sample output - yours may be different.
0

:%s/<string old>/<string new>/g

Plancton · 2015-11-10 17:05:11 10
Remove blank lines from a file using grep and save output to new file
This is sample output - yours may be different.
0

awk NF

aktau · 2017-05-24 12:08:27 17
Grep the process excluding the grep itself.
This is sample output - yours may be different.
0

ps -ef | grep [t]clsh

tensaix2j · 2009-02-25 11:21:49 8
prints line numbers

No need $_ netp ;)
This is sample output - yours may be different.
0

perl -pe 'print "$. "' <file>

sputnick · 2009-12-08 16:11:51 10
print line and execute it in BASH

since we're repeating the command there after the semicolon, we only need one backtick Show Sample Output
This is sample output - yours may be different.
```
$ echo "ls"; `!#:0-$

echo "ls"; `echo "ls" ; `
ls
Android.mk  ardrv  devmgr  egl  file1
```
0

$ echo "command"; `!#:0-$

unixmonkey20949 · 2011-04-28 17:09:25 3
Mark a directory as one where something failed

If you use colored ls(1), the broken symbolic links significantly differ from regular files and directories in the ls listing. In my case it is bright red. 0 is for getting the first place in the list.
This is sample output - yours may be different.
0

fail () { ln -s /nonexistent 0_FAIL_${1}; }

pipeliner · 2011-11-06 20:14:33 3
list with full path
This is sample output - yours may be different.
0

find `pwd` -maxdepth 1 -exec ls --color -d {} \;

kev · 2011-12-16 06:18:35 5
find all c and cpp files except the ones in the unit-test and android subdirectories

works only in zsh, requires EXTENDED_GLOB to be set.
This is sample output - yours may be different.
0

ls **/*.c(|pp)~(unit-test|android)/*

bst · 2012-04-27 07:43:22 8
Mute Master sound channel, printing only the percent volume
This is sample output - yours may be different.
0

amixer -c 0 set Master toggle | sed -n "$ p" | awk '{print $4}' | sed "s/[^0-9]//g"

dtsip · 2012-06-26 21:16:42 7
list all files are greater than 10mb

list all files are greater than 10mb lent from: http://www.tippscout.de/linux-grosze-dateien-finden_tipp_1653.html
This is sample output - yours may be different.
0

ls -lahS $(find / -type f -size +10000k)

Ichag · 2013-04-22 12:08:16 5
watch video youtube without flash but with mplayer and youtube-dl
This is sample output - yours may be different.
0

mplayer $(youtube-dl -g http://youtube.com/example)

aiki46 · 2013-12-06 15:39:23 9
Use grep to get multiple patterns.

Using egrep to search multiple patterns. Show Sample Output
This is sample output - yours may be different.
```
ERROR: This is an error message.
CRITICAL: This is a critical message.
WARNING: This is a warning message.
```
0

egrep -wi --color 'warning|error|critical'

krizzo · 2014-10-07 17:06:39 8
dd with pretty progress bar (Requires pv and dialog)
This is sample output - yours may be different.
0

(pv -n centos-7.0-1406-x86_64-DVD.img | dd of=/dev/disk4 bs=1m conv=notrunc,noerror) 2>&1 | dialog --gauge "Copying CentOS to USB Stick in /dev/disk4" 10 70 0

BoxingOctopus · 2015-01-19 19:36:15 12
Info cpu

4.1.6-1-ARCH Info cpu
This is sample output - yours may be different.
0

cat /proc/cpuinfo | less

olto · 2015-10-01 04:34:03 10
Clear DNS cache on a mac

This will clear Mac OS's DNS cache, which has been a source of issues for me in the past.
This is sample output - yours may be different.
0

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

abeardevil · 2017-02-24 18:34:49 17
split email by @ with awk

splitting email by @ with awk Show Sample Output
This is sample output - yours may be different.
```
xxx.com
```
0

echo $mail | awk -F'@' '{print $2}'

aysadk · 2017-05-24 22:36:28 17
set open firmware password command mode

Sets the Open Firmware to ask for password when selecting a boot volume other then the hd
This is sample output - yours may be different.
0

/usr/local/bin/OFPW -mode 1

tomslick · 2009-02-18 14:48:31 5
Add all not commited files to svn
This is sample output - yours may be different.
0

svn st | grep ^? | xargs svn add 2> /dev/null

douglas · 2009-02-25 11:40:51 6
When feeling boring this command help too

sudo apt-get install bb A demoscene intro in ascii art with tracker song
This is sample output - yours may be different.
0

bb

eastwind · 2009-04-22 05:33:25 7
Poor man's unsort (randomize lines)

If you need to randomize the lines in a file, but have an old sort commands that doesn't support the -R option, this could be helpful. It's easy enough to remember so that you can create it as a script and use that. It ain't real fast. It ain't safe. It ain't super random. Do not use it on untrusted data. It requires bash for the $RANDOM variable to work. Show Sample Output
This is sample output - yours may be different.
```
$ echo -e a\\nb\\nc | while read l; do echo $RANDOM "$l"; done | sort -n | cut -d " " -f 2-
c
a
b
```
0

while read l; do echo $RANDOM "$l"; done | sort -n | cut -d " " -f 2-

ketil · 2010-02-03 22:36:34 4
simple regex spell checker

searches through the linux dictionary for the word you're trying to spell (you can use regular expressions, e.g. "< /usr/share/dict/words egrep bro[c]+o[l]+i" ) Show Sample Output
This is sample output - yours may be different.
```
onomatopoeia
onomatopoeial
onomatopoeian
```
0

< /usr/share/dict/words egrep onomatopoeia

smop · 2010-08-13 00:12:39 4
Zip a directory recursively, excluding some contained directories

This zips a directory recursively but excludes some directories within the zipped directory. Useful for excluding .svn and .git directories, or compilation targets.
This is sample output - yours may be different.
0

zip -r new.zip dir_to_zip -x '*/dir_to_exclude1/*' -x '*/dir_to_exclude2/*'

rocketraman · 2010-11-18 09:38:50 6

Pascal's triangle

see: http://en.wikipedia.org/wiki/Pascal%27s_triangle Show Sample Output

l=10;for((i=0;i<$l;i++));do eval "a$i=($(pv=1;v=1;for((j=0;j<$l;j++));do [ $i -eq 0 -o $j -eq 0 ]&&{ v=1 && pv=1; }||v=$((pv+a$((i-1))[$((j))]));echo -n "$v ";pv=$v;done;));";eval "echo \"\${a$i[@]}\"";done | column -t;

glaudiston · 2011-02-11 17:00:20 16

Download 40 top funnyjunk Images to the current directory

If your version of curl does not support the --compressed option, use curl -s http://funnyjunk.com | gunzip instead of curl -s --compressed http://funnyjunk.com
This is sample output - yours may be different.
0

curl -s --compressed http://funnyjunk.com | awk -F'"' '/ '"'"'mainpagetop24h'"'"'/ { print "http://funnyjunk.com"$4 }' | xargs curl -s | grep -o 'ht.*m/pictures/.*\.jpg\|ht.*m/gifs/.*\.gif' | grep "_......_" | uniq | xargs wget

laniner · 2011-07-21 15:57:21 6
‹ First < 403 404 405 406 407 > Last ›

What's this?

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

Share Your Commands

Check These Out

sleep for 1/10s or 1/100s or even 1/1000000s

sleep in microseconds instead of seconds Alternatively to usleep, which is not defined in POSIX 2008 (though it was defined up to POSIX 2004, and it is evidently available on Linux and other platforms with a history of POSIX compliance), the POSIX 2008 standard defines nanosleep

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

continuously check size of files or directories

very handy if you copy or download a/some file(s) and want to know how big it is at the moment

Dump a configuration file without comments or whitespace...

A short, *easy-er* to remember command for stripping whitespace and comments from a config file, (or any file for that matter). Remember regex as: slash, space, star. pound, slash, bar. pointy-hat, dollar. (or "caret, dollar" if you must) :-P

Remove security limitations from PDF documents using ghostscript

Remove security from PDF document using this very simple command on Linux and OSX. You need ghostscript for this baby to work.

sort ugly text

Often, when sorting you want the sort to ignore extraneous characters. The b, d, and f tell sort to ignore leading blanks, use 'dictionary order' (ignore punctuation), and ignore (fold) case. Add a "u" if you only want one copy of duplicate lines. This is a great command to use within vim to sort lines of text, using !}sort -bdf

Display the tree of all instance of a particular process

permanently let grep colorize its output

This will create a permanent alias to colorize the search pattern in your grep output

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Execute a command with a timeout

I like much more the perl solution, but without using perl. It launches a backgroup process that will kill the command if it lasts too much. A bigger function: check_with_timeout() { [ "$DEBUG" ] && set -x COMMAND=$1 TIMEOUT=$2 RET=0 # Launch command in backgroup [ ! "$DEBUG" ] && exec 6>&2 # Link file descriptor #6 with stderr. [ ! "$DEBUG" ] && exec 2> /dev/null # Send stderr to null (avoid the Terminated messages) $COMMAND 2>&1 >/dev/null & COMMAND_PID=$! [ "$DEBUG" ] && echo "Background command pid $COMMAND_PID, parent pid $$" # Timer that will kill the command if timesout sleep $TIMEOUT && ps -p $COMMAND_PID -o pid,ppid |grep $$ | awk '{print $1}' | xargs kill & KILLER_PID=$! [ "$DEBUG" ] && echo "Killer command pid $KILLER_PID, parent pid $$" wait $COMMAND_PID RET=$? # Kill the killer timer [ "$DEBUG" ] && ps -e -o pid,ppid |grep $KILLER_PID | awk '{print $1}' | xargs echo "Killing processes: " ps -e -o pid,ppid |grep -v PID | grep $KILLER_PID | awk '{print $1}' | xargs kill wait sleep 1 [ ! "$DEBUG" ] && exec 2>&6 6>&- # Restore stderr and close file descriptor #6. return $RET }

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)

All commands (14,187) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

All commands (14,187)

sorted by