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find . -name "*.c" -exec sed -i "/\/sh/a\####################################\n#Date:2010-05-18\n#Company:XXXXX tech Co.\n#Author:Wangjunling\n#Copyright:gpl\n####################################" {} \;
2010-05-18 03:08:47
User: yogoloth
Functions: find sed
-5
Up
Down
bat add copyright info
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
iptables -F
2009-02-16 13:09:36
User: Russell
Functions: iptables
-5
Up
Down
Delete all firewall rules in a chain or all chains
Comments (3) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
removedir(){ read -p "Delete the current directory $PWD ? " human;if [ "$human" = "yes" ]; then [ -z "${PWD##*/}" ] && { echo "$PWD not set" >&2;return 1;}; rm -Rf ../"${PWD##*/}"/ && cd ..; else echo "I'm watching you" | pv -qL 10; fi; }
2010-01-20 08:01:21
User: oshazard
Functions: cd echo read rm
Tags: bash
-5
Up
Down
Remove current directory (REVISED)

Credit goes to "eightmillion"

Show sample output | Comments (3) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
say `cat /path/to/textfile.txt`
2009-08-18 19:41:42
User: eponafries
-5
Up
Down
Read aloud a text file in Mac OS X
Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
p=$(netstat -nate 2>/dev/null | awk '/LISTEN/ {gsub (/.*:/, "", $4); if ($4 == "4444") {print $8}}'); for i in $(ls /proc/|grep "^[1-9]"); do [[ $(ls -l /proc/$i/fd/|grep socket|sed -e 's|.*\[\(.*\)\]|\1|'|grep $p) ]] && cat /proc/$i/cmdline && echo; done
2009-04-30 12:39:48
User: j0rn
Functions: awk cat grep ls netstat sed
Tags: sed awk ls grep netstat
-5
Up
Down
netstat -p recoded (totaly useless..)

Ok so it's rellay useless line and I sorry for that, furthermore that's nothing optimized at all...

At the beginning I didn't managed by using netstat -p to print out which process was handling that open port 4444, I realize at the end I was not root and security restrictions applied ;p

It's nevertheless a (good ?) way to see how ps(tree) works, as it acts exactly the same way by reading in /proc

So for a specific port, this line returns the calling command line of every thread that handle the associated socket

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
netstat -nlput
2013-05-09 08:15:04
User: techie
Functions: netstat
-5
Up
Down
Prints tcp and udp connections
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
wget -O - -q http://whatismyip.org/
2011-10-15 11:36:56
User: ztank1013
Functions: wget
-5
Up
Down
Get your external IP address

This just output your external IP, no extra characters at the end of line.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
man <command> then type h
2011-10-16 09:49:56
User: stanix
Functions: man type
Tags: man search navigate
-5
Up
Down
Learn searching and navigating in man like a boss

Read all chapters up to 'Jumping', improve your effectiveness of wirking in terminal.

Most useful are the Moving and Searching commands

Comments (3) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
watch 'ls -tr1 | tail -n1 | xargs tail'
2013-05-09 11:37:59
User: batandwa
Functions: tail watch xargs
Tags: tail ls xargs watch
-5
Up
Down
Poll and print end of lates modified file

Watches for file modifications in the current directory and tails the file.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
df -h
2009-07-08 11:25:28
User: Paaskehare
Functions: df
-5
Up
Down
Show the amount of space left on mounted harddrives

Bulit-in function in linux, so should work on any linux distribution.

Show sample output | Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
udhcpc -i eth0
2012-09-18 10:36:46
User: huazhihao
-5
Up
Down
obtain ip
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zip -r -9 /var/www/html/project.zip /var/www/html/project
2010-01-22 16:51:11
User: svnlabs
-5
Up
Down
Project Zipped

Project Zipped

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find . -type d -name 'CVS' | xargs rm -r
2011-08-10 07:38:51
User: kev
Functions: find rm xargs
Tags: find
-5
Up
Down
remove all CVS directories
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ls -1 static/images/ | while read line; do echo -n $line' '[; grep -rc $line *|grep -v ".svn"|cut -d":" -f2|grep -vc 0| tr "\n" -d; echo -n ]; echo ; done
2009-03-20 20:33:36
User: psytek
Functions: cut echo grep ls read tr
Tags: unix clean project static
-5
Up
Down
Recursively grep a subdirectory for a list of files

This command will grep the entire directory looking for any files containing the list of files. This is useful for cleaning out your project of old static files that are no longer in use. Also ignores .svn directories for accurate counts. Replace 'static/images/' with the directory containing the files you want to search for.

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
while true; do ifconfig eth0 | grep "inet addr:"; sleep 60; done;
2009-04-01 19:29:28
User: bandit36
Functions: grep ifconfig sleep
Tags: script while loop
-5
Up
Down
Periodically loop a command

You can use this to loop any command to periodically see the output.

while true; do [YOUR COMMAND HERE]; sleep [# of seconds]; done;

Alternatively, you can put it in a simple shell script to save typing!

#/!bin/bash

while true; do $1; sleep $2; done;

/path/to/script.sh "ifconfig eth0 | grep 'inet addr:'" 60
Show sample output | Comments (8) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
scp /home/svnlabs.txt root@92.178.0.56:/home/
2010-01-22 21:19:37
User: bakhru
Functions: scp
Tags: a2zfa file cop
-5
Up
Down
Upload file to remote server using SCP
Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
set colsep "{char}"
2011-04-05 10:48:48
User: EBAH
Functions: set
Tags: oracle
-5
Up
Down
Oracle: set column separator

set colsep "&TAB" -- for tab separator

set colsep "|" -- for pipe separator

etc...

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
du -sh some/directory
2010-02-21 02:08:28
User: Jacolyte
Functions: du
-5
Up
Down
Show the size of a directory

Displays only the subtotal size of a directory with the -s option, and in human readable format.

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ssh -X johndoe@123.456.789
2011-05-19 21:28:25
User: evandrix
Functions: ssh
-5
Up
Down
3 Simple Steps to X11 Forward on Mac OS X

To start X11 display only on your local machine: xeyes &

Extensions to basic command: ssh -X -f user@remotehost xcalc -bg black -fg green

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xdg-open http://xkcd.com/
2010-08-25 19:14:11
User: unixmonkey8024
Tags: bash curl function browser xkcd comic webcomic
-5
Up
Down
View the newest xkcd comic.

KISS

To get a random xkcd comic:

xdg-open http://dynamic.xkcd.com/random/comic/
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
psg() { ps aux | grep "[${1[1]}]${1[2,-1]}"; }
2009-09-07 04:37:11
User: jedahan
Functions: grep ps
-5
Up
Down
Find the process you are looking for minus the grepped one

alias ps?='psg' for maximum hawtness. Works in bash or zsh.

Show sample output | Comments (3) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
for %f in (c) do dir %f:\*.jpg /s /p
2009-05-05 18:28:18
User: copremesis
Functions: dir
-5
Up
Down
Find all jpgs on the PC (DOS command)

there is no explicit find command in DOS you can create a batch file with this one and find all jpegs on the C drive ...

note: if creating a batch file "find.bat" the syntax changes to:

for %%f in (c) do dir %%f:\%1 /s /p

you can then use

find *.jpg
Show sample output | Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
for f in *; do mv $f <target_path>; done;
2009-07-09 12:07:49
User: fritz_monroe
Functions: mv
-5
Up
Down
Move large numbers of files

In my job I often have to deal with moving 100,000 files or more. A mv won't do it because there are too many. This will move everything in the current directory to the target path.

Comments (7) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ifconfig | grep addr:192 | sed s/Bcast.*// | sed 's/^.*inet addr://'
2010-03-26 07:37:21
User: hasenj
Functions: grep ifconfig sed
-5
Up
Down
show your private/local ip address

This assumes your local ip starts with 192.something (e.g. 192.168), it greps ifconfig output for an ip that starts with 192, then strips the extra garbage (besides the ip)

Maybe `ifconfig | grep addr | grep Bcast` would also do it

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for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"
2009-03-23 10:19:12
User: iain
Tags: ffmpeg ogg mp3
-5
Up
Down
Convert a bunch of oggs into mp3s
Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate