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Delete all files in current directory that have been modified less than 5 days ago.
This is sample output - yours may be different.
-5

find ./ -mtime -5 | xargs rm -f

skye · 2009-03-23 21:00:45 13
Gets a random Futurama quote from /.
This is sample output - yours may be different.
26

curl -Is slashdot.org | egrep '^X-(F|B|L)' | cut -d \- -f 2

icco · 2009-03-23 19:58:10 18
Display which user run process from given port name

Display which user run process from given port name Show Sample Output
This is sample output - yours may be different.
```
$ fuser -nu tcp 3691
3691/tcp:            22552(john)
```
7

fuser -nu tcp 3691

servermanaged · 2009-03-23 19:40:34 6
find the process that is using a certain port e.g. port 3000
This is sample output - yours may be different.
11

lsof -P | grep ':3000'

thisduck · 2009-03-23 18:41:24 11
copy/mkdir and automatically create parent directories

The --parents option will cause cp or mkdir to automatically create the parent directory structure. mkdir --parents /one/two/three/dir will create /one, /one/two, and /one/two/three as needed before creating dir. cp will copy files with their full directory structure into the target directory with this option. Thanks to Peter Leung at: http://linuxcommando.blogspot.com/2007/11/use-of-parents-flag-in-mkdir-and-c.html which has good examples of usage.
This is sample output - yours may be different.
7

cp --parents /source/file /target-dir

bitmage · 2009-03-23 18:35:15 10
Kill all processes belonging to a single user.
This is sample output - yours may be different.
5

kill -9 `ps -u <username> -o "pid="`

skye · 2009-03-23 17:51:37 10
Kills all processes for a certain program
This is sample output - yours may be different.
-2

kill -9 $(pidof process)

luisuribe · 2009-03-23 17:07:55 8
Go to end of current command line
This is sample output - yours may be different.
-2

CTRL + e

hardest · 2009-03-23 16:42:10 10
Go to begin of current command line

Go to begin of the current command line.
This is sample output - yours may be different.
-1

CTRL + a

hardest · 2009-03-23 16:41:04 8
find a class or file within a number of jar files
This is sample output - yours may be different.
-3

for i in `find . | grep jar$`; do echo $i; jar tvf $i | grep 'search-string'; done;

thisduck · 2009-03-23 16:18:26 6
kills all processes for a certain program e.g. httpd
This is sample output - yours may be different.
-5

ps aux | grep 'httpd ' | awk {'print $2'} | xargs kill -9

thisduck · 2009-03-23 16:15:06 17
Create a favicon

Create a favicon suitable for use on your web site. Note: ppmtowinicon is part of libpbm, not ImageMagick.
This is sample output - yours may be different.
14

convert -colors 256 -resize 16x16 face.jpg face.ppm && ppmtowinicon -output favicon.ico face.ppm

medina · 2009-03-23 15:00:13 10
Downsample mp3s to 128K

This will lower the quality of mp3 files, but is necessary to play them on some mobile devices.
This is sample output - yours may be different.
4

for f in *.mp3 ; do lame --mp3input -b 128 "$f" ./resamp/"$f" ; done

jjclarkson · 2009-03-23 14:39:14 5
Convert .flv to .3gp

Download YouTube videos as .flv and convert them to .3gp for your mobile phone.
This is sample output - yours may be different.
5

ffmpeg -i file.flv -r 15 -b 128k -s qcif -acodec amr_nb -ar 8000 -ac 1 -ab 13 -f 3gp -y out.3gp

jjclarkson · 2009-03-23 14:30:45 5
Recursive file content search
This is sample output - yours may be different.
-3

find . -name *.php | xargs grep -i -n 'TERM'

crashrox · 2009-03-23 14:27:55 31
Create black and white image

Use ImageMagick to create a "black and white" copy of an image.
This is sample output - yours may be different.
4

convert -colorspace gray face.jpg gray_face.jpg

medina · 2009-03-23 14:18:04 7
Add a function you've defined to .bashrc

Example: To store the function addfunction after you have defined it: addfunction addfunction
This is sample output - yours may be different.
6

addfunction () { declare -f $1 >> ~/.bashrc ; }

dagh · 2009-03-23 12:55:04 8
Quick alias for playing music.

An alias i made for myself to play music in a faster way. Works great when you have Guake / Tilda installed (Console that drops down like in the game QUAKE) --- I put this in my bash_alias file (I'm on ubuntu, the bash_alias file does autostart with the right config) but it works putting it in bashrc too. Or anything that autostarts when the console is opened. --- Needs Mplayer and music files to work. With out music theres nothing to play! Oh, and also, without modification, this alias will try to play stuff from your ~/Music folder! (case sensitive). Make sure that folder exists and has music OR edit this alias to fit your needs. Show Sample Output
This is sample output - yours may be different.
```
dude@boxy:~$ mux
File.mp3 anotherfile Moremusic Hardrock.mp3
File> Hardrock.mp3
<Insert lots of unneeded Mplayer output here>
```
-2

alias mux='clear && cd ~/Music/ && ls && echo -n "File> " && read msi && mplayer ~/Music/$msi'

Noxn · 2009-03-23 10:45:27 16
Convert a bunch of oggs into mp3s
This is sample output - yours may be different.
-5

for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"

iain · 2009-03-23 10:19:12 5
Remux an avi video if it won't play easily on your media device

When playback of AVI files (containing a video format like XviD or DivX) is stuttering, it in 90% of the files is caused by a poorly or wrongly interleaved file. The issue can be permanently resolved by RE-MUXING the AVI video-files that have this problem
This is sample output - yours may be different.
7

mencoder -ovc copy -oac copy -of avi -o remuxed.avi original.avi

iain · 2009-03-23 10:15:36 5

start vim in diff mode

vim will open both files side by side and show colored diffs Show Sample Output

vimdiff file{1,2}

H4rpy · 2009-03-23 10:08:16 6

Enable V4l2 Webcams

Cheese or other webcam software not working? Try this.
This is sample output - yours may be different.
-1

gst-launch v4l2src

samliu · 2009-03-23 05:45:00 4
clear current line
This is sample output - yours may be different.
17

CTRL+u

allinurl · 2009-03-23 04:20:15 22
go to home directory
This is sample output - yours may be different.
-25

cd

veganstraightedg · 2009-03-23 03:12:40 10
loop over a set of items that contain spaces

If you want to operate on a set of items in Bash, and at least one of them contains spaces, the `for` loop isn't going to work the way you might expect. For example, if the current dir has two files, named "file" and "file 2", this would loop 3 times (once each for "file", "file", and "2"): for ITEM in `ls`; do echo "$ITEM"; done Instead, use a while loop with `read`: ls | while read ITEM; do echo "$ITEM"; done Show Sample Output
This is sample output - yours may be different.
```
file
file 2
```
10

ls | while read ITEM; do echo "$ITEM"; done

fletch · 2009-03-22 23:33:13 9
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Sort files in folders alphabetically

Creates one letter folders in the current directory and moves files with corresponding initial in the folder.

Transfers clipboard content from one OS X machine to another

This uses ssh to transfer the contents of one Mac's clipboard to another's. This only works with plain text, sadly. Trying to transfer images will just clear out the remote machine's clipboard, and rich text will be converted to plain text. Using the "Remote Login" must be enabled on the remote machine (via System Preferences' Sharing panel) for this to work.

Monitor a file's size

use "watch" instead of while-loops in these simple cases

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Kill process by pid

To kill a process in windows by using the PID. Change 10728 to the PID of the process you want to kill.

Update program providing a functionality on Debian

On Debian systems, choose which command provides java. Works for all alternatives listed in /etc/alternatives.

extracts 64 bytes of random digits from random lines out of /dev/random sent to stdio

Use this the next time you need to come up with a reasonably random bitstring, like for a WPA/WPA2 PSK or something. Takes a continuous stream of bytes coming from /dev/urandom, runs it through od(1), picking a random field ($0 and $1 excluded) from a random line and then prints it.

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

encode image to base64 and copy to clipboard

I use it for embedding images in CSS for Stylish, the Firefox addon. Thought it might be useful to others.

Update twitter from command line without reveal your password

Update twitter from commandline, without revealing your password and without having to type it interactively. You 'll need to put a line "machine twitter.com login TWITTERUSER password TWITTERPASS" in $HOME/.netrc and better chmod 600 that file.

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