All commands sorted by votes

All commands (14,187)

sorted by

Which files/dirs waste my disk space
This is sample output - yours may be different.
0

du -h / | grep -w "[0-9]*G"

pashutinsky · 2011-07-23 19:02:11 3
edit a executable script

vie myscript will find where myscript is, and then use vi to edit that file. Not much trick, but saves typing if you use it a lot.
This is sample output - yours may be different.
0

vie(){vi $(which $1)}

lpb612 · 2011-10-03 15:07:19 7
Execute git submodule update in parallel with xargs
This is sample output - yours may be different.
0

git submodule status | awk '{print $2}' | xargs -P5 -n1 git submodule update --init

lox · 2012-06-27 19:26:56 3
Java app with dynamic classpath

Lauching an app including jars in an adjacent lib folder to its classpath
This is sample output - yours may be different.
0

java -jar app.jar -cp $(echo lib/*.jar | tr ' ' ':')

xymor · 2012-10-29 12:51:46 16

Simple calendar from google spanning the width of the terminal

Using the gcalcli interface to google calendar, print the calendar for the next 2 weeks according to the width of the terminal being used. * Remove "--mon" to start week on sunday, * Change 2 for more or less weeks gcalcli --mon --width $((COLUMNS/8)) calm for whole month Show Sample Output

This is sample output - yours may be different.

+------------+------------+------------+------------+------------+------------+------------+
|Monday      |Tuesday     |Wednesday   |Thursday    |Friday      |Saturday    |Sunday      |
+------------+------------+------------+------------+------------+------------+------------+
|01 Jul      |02 Jul      |03 Jul      |04 Jul **   |05 Jul      |06 Jul      |07 Jul      |
|            |            |            |            |            |            |            |
|10:00am     |James       |            |            |            |Tom's       |1:00pm      |
|Hair apt    |birthday    |            |            |            |birthday    |German      |
|            |            |            |            |            |            |Grand Prix  |
|            |6:30pm BBQ  |            |            |            |            |            |
|            |at Toby's   |            |            |            |            |            |
|            |house       |            |            |            |1:00pm      |            |
|            |            |            |            |            |Qualifying  |            |
|            |            |            |            |            |Session     |            |
|            |            |            |            |            |(German     |            |
|            |            |            |            |            |Grand Prix) |            |
+------------+------------+------------+------------+------------+------------+------------+
|08 Jul      |09 Jul      |10 Jul      |11 Jul      |12 Jul      |13 Jul      |14 Jul      |
|            |            |            |            |            |            |            |
|Degree      |Michael     |Samantha    |Alice       |            |Sara &      |Zoe         |
|Congregation|birthday    |birthday    |birthday    |            |Scott       |birthday    |
|            |            |            |            |            |            |            |
|3:45pm      |            |            |            |            |            |            |
|Degree      |            |            |            |            |            |            |
|Congregation|            |            |            |            |            |            |
|Reception   |            |            |            |            |            |            |
|            |            |            |            |            |            |            |
+------------+------------+------------+------------+------------+------------+------------+

gcalcli --mon --width $((COLUMNS/8)) calw 2

jaw42 · 2013-07-04 12:28:51 40

Show the network stats for a given day

Choose the /var/log/sa/saXX log based on what day you want to view. You can use ifconfig to find the name of the interface. You can use the -s flag to specify a certain time period, e.g. -s 12:00:00 -e 14:00:00 Show Sample Output

sar -n DEV -f /var/log/sa/sa05 |awk '{if ($3 == "IFACE" || $3 == "eth0" || $2 == "eth0") {print}}'

jmorganwalker · 2014-03-06 21:32:54 11

Search google.com on your terminal

Mac OSX friendly version of google function Show Sample Output
This is sample output - yours may be different.
```
http://www.bbc.co.uk/schoolradio/subjects/earlylearning/nurserysongs/P-T/row_row_row_your_boat
http://www.bbc.co.uk/schoolradio/subjects/earlylearning/nurserysongs/P-T/row_row_row_your_boat
http://www.wordsforlife.org.uk/songs/row-your-boat
http://supersimplelearning.com/other-songs/row-row-row-your-boat/
http://wiki.kcls.org/index.php/Row,_Row,_Row_Your_Boat
http://bussongs.com/songs/row-row-row-your-boat.php
```
0

function google { Q="$@";GOOG_URL='https://www.google.com/search?tbs=li:1&q=';AGENT="Mozilla/4.0";stream=$(curl -A "$AGENT" -skLm 10 "${GOOG_URL}${Q//\ /+}");echo "$stream" | grep -o "href=\"/url[^\&]*&" | sed 's/href=".url.q=$[^\&]*$.*/\1/';}

davethomas11 · 2014-06-18 17:20:41 6
Basic search for Quassel PostgreSQL database

Replace the credentials to psql if necessary, and the my-query part with your query. Show Sample Output
This is sample output - yours may be different.
```
alias quassel-grep='psql -U quassel quassel -c "SELECT message FROM backlog ORDER BY time DESC LIMIT 1000;" | grep'

# Get messages directed at me
quassel-grep -E Tatsh[,\:]
```
0

psql -U quassel quassel -c "SELECT message FROM backlog ORDER BY time DESC LIMIT 1000;" | grep my-query

Tatsh · 2014-10-12 19:53:06 7
Start Mandala Integration
This is sample output - yours may be different.
0

nohup StartMand.sh -e -b -d mandala.cfg GET_FILES SALES_TRX AGG_TRX &

slyfer · 2015-05-19 11:25:43 9
create 7 variables using output of date command

minimal oneliner to keep track of time Show Sample Output
This is sample output - yours may be different.
```
echo $year $month $day $hour $minutes $seconds $epoch
2015 11 10 23 24 21 1447226661
```
0

read year month day hour minutes seconds epoch _ < <(date '+%Y %m %d %H %M %S %s')

snorf · 2015-11-11 07:27:37 9
Recursive script to find all epubs in the current dir and subs, then convert to mobi using calibre's ebook-convert utility

If you want to change it to find other ebook format change the find extension and the output extensions for whatever that is.
This is sample output - yours may be different.
0

$find . -name '*.mobi' -exec ebook-convert {} {}.epub \;

vfdurder · 2015-12-29 17:55:17 10
Use vi style for edit command line.

after this command, only needs press ESC to edit command line.
This is sample output - yours may be different.
0

set -o vi

Wallebot · 2017-02-27 19:04:33 22
Reclaim standard in from the tty for a script that is in a pipeline

Tests to see if stdin (0) is NOT a terminal. Tests to see if stdout (1) IS a terminal. Copies stdout (opened for write) to stdin (open for read). Show Sample Output
This is sample output - yours may be different.
```
# THIS IS A BASIC DEMO SCRIPT
$ cat ttytest.sh 
#!/bin/bash

while read -t 0.05 ; do
        echo -n . 
done ; echo
read -p "Hello? " R1
echo "${R1:-No reply}"
[ ! -t 0 ] && [ -t 1 ] && exec 0<&1
read -p "Hello?? " R2
echo "${R2:-No reply}"


# RUN IT WITHOUT PIPING
$ bash ttytest.sh 

Hello? hi
hi
Hello?? hi again
hi again


# RUN IT WITH PIPING
$ date | bash ttytest.sh 
.
No reply
Hello?? Hi 
Hi
```
0

[ ! -t 0 ] && [ -t 1 ] && exec 0<&1

pdxdoughnut · 2017-04-12 00:10:27 18
grep multiple value matches that matches all togetger one the same value(concurrency) also
This is sample output - yours may be different.
0

grep '^$default\|smtp\|relay$[^ ]*concurrency[^ ]*'

aysadk · 2017-06-04 15:26:35 17
Get the current epoch in base32
This is sample output - yours may be different.
0

obase=16; echo "$(date +%s)" | bc | xxd -r -p | base32

malathion · 2017-06-26 16:58:38 22
nc check udp port
This is sample output - yours may be different.
0

nc -vz -u 8.8.8.8 53

aysadk · 2017-08-16 19:57:42 17
Replace lines in files with only spaces/tabs with simple empty line (within current directory - recursive)
This is sample output - yours may be different.
0

find . -type f -regex '.*\.$cpp\|h$' -exec sed -i 's/^[[:blank:]]\+$//g' {} \;

swarzynski · 2020-09-15 09:07:08 144
Delete posts from MyBB Board as User

As a user, deletes all your posts from a MyBB board (provided you have the search page listings of all your posts saved into the same directory this command is run from). Full command: for i in *; do cat $i | grep pid | sed -e 's/;/\ /g' -e 's/#/\ /g' -e 's/pid=/\ /g' | awk -F ' ' '{print $2}' >> posts.txt; done; for c in `cat posts.txt`; do curl --cookie name= --data-urlencode name=my_post_key=\&delete=1\&submit=Delete+Now\&action=deletepost\&pid=$c --user-agent Firefox\ 3.5 --url http://url/editpost.php?my_post_key=\&delete=1\&submit=Delete+Now\&action=deletepost\&pid=$c; sleep 2s; done; echo
This is sample output - yours may be different.
0

curl --cookie name=<cookie_value> --data-urlencode name=my_post_key=<post_key>\&delete=1\&submit=Delete+Now\&action=deletepost\&pid=$c --user-agent Firefox\ 3.5 --url http://url/editpost.php?my_post_key=<post_key>\&delete=1\&submit=Delete+Now\&action=dele

mrlockfs · 2010-07-14 01:50:48 5
Export usernames and passwords from sslstrip log
This is sample output - yours may be different.
0

grep -i -f password_tokens sslstrip.log | awk ' BEGIN { RS="&" } { print $1 }' | grep -i -f tokens_file

anhpht · 2010-12-18 15:42:00 4
Wait the end of prog1 and launch prog2
This is sample output - yours may be different.
0

while pkill -0 prog1; do sleep 10; done; prog2

daa · 2011-02-12 02:53:53 5
dd with progress bar and remaining time displayed
This is sample output - yours may be different.
0

SIZE=`fdisk -s /dev/sdx`; dd if=/dev/sdx bs=1M | pv -s "$SIZE"k > hdd.img

dash · 2011-06-12 20:00:26 3
Copy your ssh public key to a server from a machine that doesn't have ssh-copy-id

Creates the .ssh directory on the remote host with proper permissions, if it doesnt exist. Appends your public key to authorized_keys, and verifies it has proper permissions. (if it didnt exist it may have been created with undesireable permissions). *Korn shell syntax, may or may not work with bash
This is sample output - yours may be different.
0

ssh <user>@<host> 'mkdir -m 700 ~/.ssh; echo ' $(< ~/.ssh/id_rsa.pub) ' >> ~/.ssh/authorized_keys ; chmod 600 ~/.ssh/authorized_keys'

Halki · 2011-10-03 15:59:43 3

Embed .torrent in a .jpg file

exiftool can also extract the 'comment' into a file :) Show Sample Output

exiftool '-comment<=ubuntu-11.10-alternate-i386.iso.torrent' hello.jpg

dp3XTg · 2012-03-12 04:42:15 7

List all symbolic links in current directory

Just added maxdepth
This is sample output - yours may be different.
0

find . -maxdepth 1 -type l

Fidelix · 2012-12-30 20:49:28 4
Revoke an existing user's group memberships and add another user to those same groups,

Assuming a convention looking group file, this command will eject oldspiderman from the leagueofsuperfriends group and add newspiderman: oldspiderman:x:551: aquaman:x:552: superman:x:553: newspiderman:x:554: leagueofsuperfriends:x:1000:superman,oldspiderman,superman,aquaman
This is sample output - yours may be different.
0

sed -i.awkbak "s/$[:,]$oldspiderman/\1newspiderman/" /etc/group

iPaulo · 2013-03-01 23:48:20 4
‹ First < 408 409 410 411 412 > 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

Outputs a 10-digit random number

echo something backwards

NAME rev - reverse lines of a file or files SYNOPSIS rev [file ...] DESCRIPTION The rev utility copies the specified files to the standard output, reversing the order of characters in every line. If no files are specified, the standard input is read. AVAILABILITY The rev command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.

Changing the terminal title to the last shell command

Found the same command for zsh in http://www.davidpashley.com/articles/xterm-titles-with-bash.html - changed it a bit so that the behaviour is the same

View Owner, Group & Permissions.

#Alias alias perm="stat -c '%n %U:%G-%a'" #Function perm() { for ll in $@; do stat -c "%n %U:%G-%a" "$ll"; done; }

Downsample mp3s to 128K

This will lower the quality of mp3 files, but is necessary to play them on some mobile devices.

pretend to be busy in office to enjoy a cup of coffee

combination of several of the above

Save your sessions in vim to resume later

Creates a full snapshot of your current vim session, including tabs, open buffers, cursor positions, everything. Can be resumed with vim -S . Useful for those times when you HAVE to close vim, but you don't want to lose all your hard-opened buffers and windows. The ! will cause vim to overwrite the file if it already exists. It is not necessary, but useful if you frequently save to the same file (like session.vim or something).

Counts number of lines (in source code excluding comments)

I took java to make the find command simpler and to state that it works for any language supported by cpp. cpp is the C/C++ preprocessor (interprets macros, removes comments, inserts includes, resolves trigraphs). The -fpreprocessor option tells cpp to assume the input has already been preprocessed so it will only replace comment lines with blank lines. The -L 1 option tells xargs to launch one process for each line, indeed cpp can only process one file at the time...

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Resume scp of a big file

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