All commands sorted by votes

All commands (14,187)

sorted by

Send SVN diff to Meld
This is sample output - yours may be different.
0

svn diff --diff-cmd='meld' -r 100:BASE FILE

0disse0 · 2012-02-03 18:00:07 3
Print free RAM in MB

Does not output the word "shared" so you can easily store this number in a variable. Show Sample Output
This is sample output - yours may be different.
```
1029
```
0

free -m | awk '/cache:/ {print $4}'

felixhummel · 2012-03-13 19:54:26 4
firefox ascii logo
This is sample output - yours may be different.
0

curl -s http://people.mozilla.com/~faaborg/files/shiretoko/firefoxIcon/firefox-64.png | convert - jpg:- | jp2a --color --html -> firefox.html

kev · 2012-04-30 16:31:07 5
Create a tar archive from a text list without trailing slash in directories
This is sample output - yours may be different.
0

cat list.txt | pax -wd > archive.tar

bugmenot · 2013-01-02 17:53:52 4
Find files in current directory which are larger in size (500000k)
This is sample output - yours may be different.
0

find . -type f -size +50000k -exec ls -lh {} \; | awk '{ print $9 ": " $5 }'

maheshmahajan · 2014-06-24 07:24:39 7
Calculate CPU load limit on GNU/Linux

shell order of operation example which calculates: x = number of physical CPU's y = number of cores per CPU 2(x * y) + 1 = CPU load limit Show Sample Output
This is sample output - yours may be different.
```
9
```
0

echo "$(( $(( $(grep 'physical id' '/proc/cpuinfo' | uniq | wc -l) * $(grep 'core id' '/proc/cpuinfo' | wc -l) )) * 2 + 1 ))"

snorf · 2015-11-14 20:44:39 11
Gets shellcode opcodes from binary file using objdump

Seems to work on Ubuntu 14.02 LTS Show Sample Output
This is sample output - yours may be different.
```
"\x31\xc0\xb0\x04\x31\xdb\xb3\x01\xeb\x11\x59\x31\xd2\xb2\x0e\xcd\x80\x31"
```
0

objdump -s ./HelloWorld | grep -v '^ [0-9a-f][0-9a-f][0-9a-f][0-9a-f] \b' | grep -v 'Contents' | grep -v './' | cut -d' ' -f 3-6| sed 's/ //g' | sed '/./!d' | tr -d '\n'| sed 's/.\{2\}/&\\x/g' | sed 's/^/\\x/'|sed 's/..$//'|sed 's/^/"/;s/$/"/g'

mark20 · 2016-10-05 23:31:05 17
Color code each job for GNU Parallel

Colorize each job in a new color.
This is sample output - yours may be different.
0

parallel -j10 --tagstring '\033[30;{=$_=++$::color%8+90=}m' sleep .3{}\;seq {} ::: {1..10}

unixmonkey91589 · 2017-07-05 19:36:27 20
Creat a new user with no shell. Useful to provide other services without giving shell access.
This is sample output - yours may be different.
0

useradd -s /sbin/nologin nicdev

nicdev · 2009-02-15 14:49:17 10
print latest (top 10, top 3 or *) commandlinefu.com commands

This lengthy cryptic line will print the latest top 10 commandlinefu.com posts without their summaries. To print also their respective summaries use the following (even bigger) command line: wget -qO - http://www.commandlinefu.com/feed/tenup | xmlstarlet sel -T -t -o '<doc>' -n -t -m rss/channel/item -o '<item>' -n -o '<title>' -v title -o '</title>' -n -o '<description>' -v description -o '</description>' -n -o '</item>' -n -t -o '</doc>' | xmlstarlet sel -T -t -m doc/item -v description/code -n -v title -n -n It is recommended to include this line into a shell script to be easily run, as I do myself. You could also use the following URLs to browse the top 3 commands: wget -qO - http://www.commandlinefu.com/feed/threeup | xmlstarlet ... .. or all others: wget -qO - http://feeds2.feedburner.com/Command-line-fu | xmlstarlet ... PS: You need to install "xmlstarlet" to run it. It is found in Debian APT repositories (apt-get install xmlstarlet) or under the http://xmlstar.sourceforge.net/ URL. Show Sample Output
This is sample output - yours may be different.
```
$ ps aux | grep [p]rocess-name
$ getconf LONG_BIT
$ for I in $(mysql -e 'show databases' -s --skip-column-names); do mysqldump $I | gzip > $I.sql.gz"; done
$ free && sync && echo 3 > /proc/sys/vm/drop_caches && free
$ find . -empty -type d -exec rmdir {} +
$ exiftool '-Directory<DateTimeOriginal' -d %Y/%m/%d dir
$ tmpfile=$(mktemp) && echo -e 'startup_message off\nscreen -t top htop\nsplit\nfocus\nscreen -t nethogs nethogs wlan0\nsplit\nfocus\nscreen -t iotop iotop' > $tmpfile && sudo screen -c $tmpfile
$ /sbin/kexec -l /boot/$KERNEL --append="$KERNELPARAMTERS" --initrd=/boot/$INITRD; sync; /sbin/kexec -e
$ dig +short txt <keyword>.wp.dg.cx
$ autossh -M50000 -t server.example.com 'screen -raAd mysession'
$ knock <host> 3000 4000 5000 && ssh -p <port> user@host && knock <host> 5000 4000 3000
$ cat /var/log/secure.log | awk '{print substr($0,0,12)}' | uniq -c | sort -nr | awk '{printf("\n%s ",$0) ; for (i = 0; i<$1 ; i++) {printf("*")};}'
$ for x in `jot - 0 2400 25`; do curl "http://www.commandlinefu.com/commands/browse/sort-by-votes/plaintext/$x"  ; done > commandlinefu.txt
$ ssh -t remote_host screen -r
$ diff <(echo "$a") <(echo "$b")
```
0

wget -qO - http://www.commandlinefu.com/feed/tenup | xmlstarlet sel -T -t -o '<x>' -n -t -m rss/channel/item -o '<y>' -n -v description -o '</y>' -n -t -o '</x>' | xmlstarlet sel -T -t -m x/y -v code -n

fsilveira · 2009-08-14 02:44:00 3
Outputs a 10-digit random number
This is sample output - yours may be different.
0

echo $RANDOM$RANDOM$RANDOM |cut -c3-12

emmerich164 · 2009-10-13 08:08:45 4
Ignore subdirectories in subversion

If you would like to ignore a directory including its subdirectory. For example, a tmp/ directory
This is sample output - yours may be different.
0

find . -type d -not $ -name .svn -prune $ -exec svn propset svn:ignore '*' {} \;

tristan_ph · 2010-08-15 03:45:57 4
GREP a PDF file.
This is sample output - yours may be different.
0

grep -i '[^script$]' 1.txt

vinod · 2010-10-20 12:17:04 3
Convert .ogg to .avi
This is sample output - yours may be different.
0

mencoder -idx a.ogg -ovc lavc -oac mp3lame -o b.avi

lukasz · 2010-12-20 14:30:48 3
get a random command
This is sample output - yours may be different.
0

find $(echo "$PATH" | tr ':' ' ') -name "*program*"

hunterm · 2011-01-07 22:27:44 5
Losslessly optimize JPEG files for file size

You can also save EXIF information by copying it to temp.jpg: jpegtran -optimize -outfile temp.jpg <JPEG> && jhead -te temp.jpg "$_" && mv temp.jpg "$_"
This is sample output - yours may be different.
0

jpegtran -optimize -outfile temp.jpg <JPEG> && mv temp.jpg "$_"

h3xx · 2011-07-24 08:55:46 3
Access to a SVN repository on a different port

first need to Edit the configuration file /home/cicciobomba/.subversion and under the [tunnels] add this line ciccio_diverso = /usr/bin/ssh -p 12345
This is sample output - yours may be different.
0

sudo svn co svn+ ciccio_diverso://root@192.160.150.151/svn-repo/progettino

0disse0 · 2012-02-03 18:16:02 12
Filter Android log output by PID
This is sample output - yours may be different.
0

adb shell ps | grep my.app.packagename | awk '{print $2}' | xargs -I ? sh -c "adb logcat -v time | grep ?"

jackpatmos · 2012-03-14 10:02:11 5
Pretend your shell is MS-DOS command.com

(This may be specific to bash only.) This transforms the current working directory to all uppercase characters and replaces forward slashes with backslashes, prepending the string with "C:" and appending a single ">". It serves no practical purpose, but may serve as a great practical joke if you can insert it to some victim's .bashrc :-) Show Sample Output
This is sample output - yours may be different.
```
C:\>pwd
/
C:\>
```
0

export PROMPT_COMMAND=$PROMPT_COMMAND'; export PWD_UPCASE="${PWD^^}"'; export PS1='C:${PWD_UPCASE//\\//\\\\}>'

chungy · 2012-04-30 20:09:49 3
Command to kill PID

You can also use gawk: ps auxww | gawk '/application/' | gawk '/processtobekilled/' | gawk '{print $2}' | grep -v grep | xargs kill -9
This is sample output - yours may be different.
0

ps auxww | grep application | grep processtobekilled | gawk '{print $2}' | grep -v grep | xargs kill -9

j0sh10 · 2012-07-03 20:37:56 43
Get user's full name in Mac OS X
This is sample output - yours may be different.
0

finger `whoami` | awk -F: '{ print $3 }' | head -n1 | sed 's/^ //'

andrew_duffy · 2013-01-03 20:19:03 7
Sync a remote mysql database to a local db via SSH

There must be no space between -p and the password
This is sample output - yours may be different.
0

ssh <remoteuser>@<remoteserver> \ 'mysqldump -u <user> -p<password> <database>' \ | mysql -u <user> -p<password> <database>

kvcrawford · 2013-03-05 19:20:52 14
Maximize active window

Bind it to a shortcut key, using something like xbindkeys-config (if you do not have xbindkeys: apt-get install xbindkeys xbindkeys-config)
This is sample output - yours may be different.
0

wmctrl -r :ACTIVE: -b add,maximized_vert; wmctrl -r :ACTIVE: -b add,maximized_horz

paulera · 2013-04-24 16:59:04 11
bulk git pull
This is sample output - yours may be different.
0

for dir in ~/git/*; do (cd "$dir" && git pull); done

oumu · 2013-07-06 14:24:18 7
IBM AIX: Verify a sha256sum listing with openssl

This command is used to verify a sha256sum-formatted file hash list on IBM AIX or any other UNIX-like OS that has openssl but doesn't have sha256sum by default. Steps: 1: Save to the filesystem a script that: A: Receives as arguments the two parts of one line of a sha256sum listing B: Feeds a file into openssl on SHA256 standard input hash calculation mode, and saves the result C: Compares the calculated hash against the one received as argument D: Outputs the result in a sha256sum-like format 2: Make the script runnable 3: Feed the sha256sum listing to xargs, running the aforementioned script and passing 2 arguments at a time Show Sample Output
This is sample output - yours may be different.
```
cognos-EARs/ServletGateway-1021-SDK-customized.ear: OK
cognos-EARs/ServletGateway-1021-SDK-customizedandfixed.ear: OK
cognos-EARs/ServletGateway-1021-base.ear: OK
cognos-EARs/p2pd-1021-SDK-customized.ear: OK
cognos-EARs/p2pd-1021-base.ear: OK
```
0

echo '#! /usr/bin/ksh\ncat $2 | openssl dgst -sha256 | read hashish; if [[ $hashish = $1 ]]; then echo $2: OK; else echo $2: FAILED; fi;' > shacheck; chmod +x shacheck; cat hashishes.sha256 | xargs -n 2 ./shacheck;

RAKK · 2013-09-18 21:51:20 8
‹ First < 417 418 419 420 421 > 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

lazy SQL QUERYING

This is regarding the command 8263 using an alias to fill in command line options for psql. You can actually just type 'psql'. In order for that to work, you want to set environment variables PGDATABASE, PGHOST, PGUSER, and (except you're using the default) PGPORT. Also, you can add a line "host:port:dbname:user:password" (asterisk ok in some columns) to your ~/.pgpass file. Finally, if you don't like the aligned columns, you can add the line "\pset format unaligned" to your ~/.psqlrc file.

Timer with sound alarm

Notepad in a browser (type this in the URL bar)

It doesn't save your notes, but it's great for jotting something down quickly.

list with full path

List the full path of some files. You can add ".*" on the end if you want to display hidden files.

Change pidgin status

Thanks for the comment oshazard, i wasn't aware of purple-remote existence.

kill ip connection

needed; apt-get install tcpkill

Function to output an ASCII character given its decimal equivalent

quickest (i blv) way to get the current program name minus the path (BASH)

Useful in shell scripts when you're trying to get the shell script name without the full path - and easier than awking or cutting. Bash pattern matching and variable manip is fun.

Override and update your locally modified files through cvs..

List files older than one year, exluding those in the .snapshot directory

Useful when you want to cron a daily deletion task in order to keep files not older than one year. The command excludes .snapshot directory to prevent backup deletion. One can append -delete to this command to delete the files : $ find /path/to/directory -not $ -name .snapshot -prune $ -type f -mtime +365 -delete

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