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psgrep

You'll need to install proctools. MacPorts and Fink have this if you're running Mac OS X, check your Linux distribution's repositories if it isn't installed by default. Show Sample Output
This is sample output - yours may be different.
```
--( user@hostname )--( ~ )-- :)
--$ pgrep iTunes
236
303
--( user@hostname )--( ~ )-- :)
--$ pgrep -l iTunes
  236 iTunesHelper
  303 iTunes
```
-2

pgrep <name>

alesplin · 2010-02-28 22:59:33 10
send a message to a windows machine in a popup

It will only work if the service NETSEND in the Windows machine is enabled.
This is sample output - yours may be different.
9

echo "message" | smbclient -M NAME_OF_THE_COMPUTER

mvrilo · 2010-02-28 21:10:46 14
Start a HTTP server which serves Python docs

I use this command to start a local Python document server over HTTP port 8888.
This is sample output - yours may be different.
12

pydoc -p 8888 & gnome-open http://localhost:8888

haivu · 2010-02-28 07:01:43 14
search for a file (with regex), choose one then open it

lists the files found by find, waits for user input then uses xdg-open to open the selected file with the appropriate program. usage: findopen path expression [command] With the third optional input you can specify a command to use other than xdg-open, for example you could echo the filename to stdout then pipe it to another command. To get it to work for files with spaces it gets a bit messier... findopen() { files=( $(find "$1" -iname "$2" | tr ' ' '@') ); select file in "${files[@]//@/ }"; do ${3:-xdg-open} "$file"; break; done } You can replace the @ with any character that probably wont be in a file name.
This is sample output - yours may be different.
-1

findopen() { local PS3="select file: "; select file in $(find "$1" -iname "$2"); do ${3:-xdg-open} $file; break; done }

quigybo · 2010-02-28 02:28:59 3
Using mplayer to play the audio only but suppress the video
This is sample output - yours may be different.
9

mplayer -novideo something.mpg

mwgamera · 2010-02-27 22:25:47 10
Get all mac address
This is sample output - yours may be different.
5

ifconfig | awk '/HWaddr/ { print $NF }'

unixmonkey8473 · 2010-02-27 20:20:12 6
Mount a truecrypt drive from a file from the command line interactively

It seems to completely void the benefit of having an encrypted folder if you then have a script on your unencrypted hard drive with your password in it. This command will mount a truecrypt file at a given mount point after asking you for the password.
This is sample output - yours may be different.
2

sudo truecrypt <truecrypt-file> <mount-point>

kbrill · 2010-02-27 16:25:19 8
Get all mac address

Get mac address listed for all interfaces. Show Sample Output
This is sample output - yours may be different.
```
$ ifconfig -a| grep -o -E '([[:xdigit:]]{1,2}:){5}[[:xdigit:]]{1,2}'
00:25:4b:a2:45:72
00:25:4b:89:98:a0
00:25:4b:ff:fe:a2
0a:00:27:00:00:00
```
3

ifconfig -a| grep -o -E '([[:xdigit:]]{1,2}:){5}[[:xdigit:]]{1,2}'

evenme · 2010-02-27 14:30:43 6
psgrep

Grep for a named process. Show Sample Output
This is sample output - yours may be different.
```
eva:~ even$ psgrep sky
Grepping for processes matching sky...
kessia     253   0,0  1,1   482148  23132   ??  S    Qui04     1:13.61 /Applications/Skype.app/Contents/MacOS/Skype -psn_0_73746
```
-4

psgrep() { if [ ! -z $1 ]; then echo "Grepping for processes matching $1..." ps aux | grep -i $1 | grep -v grep; else echo "!! Need name to grep for"; fi }

evenme · 2010-02-27 13:47:28 7
Mouse Tracking

Will track your mouse and save it to a file. You can use gnuplot to graph it: gnuplot -persist <(echo "unset key;unset border;unset yzeroaxis;unset xtics;unset ytics;unset ztics;plot './mouse-tracking' with points lt 1 pt 6 ps variable")
This is sample output - yours may be different.
4

while true; do xdotool getmouselocation | sed 's/x:$.*$ y:$.*$ screen:.*/\1, \2/' >> ./mouse-tracking; sleep 10; done

matthewbauer · 2010-02-27 04:00:13 5
Commit current modified or added files in current svn repository
This is sample output - yours may be different.
0

svn status | grep -v ? | awk '{print $2}' > file.svn.txt && svn ci --targets file.svn.txt -m "[your commit message here]"

jimthunderbird · 2010-02-27 01:53:27 1096
Print Memory Utilization Percentage For a specific process and it's children

Change the name of the process and what is echoed to suit your needs. The brackets around the h in the grep statement cause grep to skip over "grep httpd", it is the equivalent of grep -v grep although more elegant. Show Sample Output
This is sample output - yours may be different.
```
RAM Used By HTTP: 50.5000%
```
6

TOTAL_RAM=`free | head -n 2 | tail -n 1 | awk '{ print $2 }'`; PROC_RSS=`ps axo rss,comm | grep [h]ttpd | awk '{ TOTAL += $1 } END { print TOTAL }'`; PROC_PCT=`echo "scale=4; ( $PROC_RSS/$TOTAL_RAM ) * 100" | bc`; echo "RAM Used by HTTP: $PROC_PCT%"

d34dh0r53 · 2010-02-26 20:29:45 8
Disaster Snapshot (procmail)

Required: 1) Systems that send out alert emails when errors, database locks, etc occur. 2) a system that: a) has the ability to receive emails, and has procmail installed. b) has ssh keys set up to machines that would send out alerts. When procmail receives alert email, you can issue a command like this one (greps and awks may very - you're isolating the remote hostname that had the issue). This will pull process trees from the alerting machines, which is always useful in later analysis. Show Sample Output
This is sample output - yours may be different.
```
(One or more files containing process trees (a snapshot) of other machines.)
```
0

for x in `grep server /tmp/error.log | awk '{print $3}'`; do \ t=`date "+%d-%m-%H%M%S"` ; ssh -q -t admin@$x.domain.com 'pstree -auln' > ~/snapshots/$x-$t.out \ done

jrparris · 2010-02-26 19:50:41 4
a function to create a box of '=' characters around a given string.

First argument: string to put a box around. Second argument: character to use for box (default is '=') Same as command #4962, cleaned up, shortened, and more efficient. Now a ' * ' can be used as the box character, and the variables get unset so they don't mess with anything else you might have. They marked c++ as a function for this command, but I'm not sure why. Must be a bug. Show Sample Output
This is sample output - yours may be different.
```
$box "Testing the box function"
============================
= Testing the box function =
============================

$box "Testing the box function" \*
****************************
* Testing the box function *
****************************
```
2

box(){ c=${2-=}; l=$c$c${1//?/$c}$c$c; echo -e "$l\n$c $1 $c\n$l"; unset c l;}

mightybs · 2010-02-26 17:14:52 3
a function to create a box of '=' characters around a given string.

First argument: string to put a box around. Second argument: character to use for box (default is '=') Same as command #4948, but shorter, and without the utility function. Show Sample Output
This is sample output - yours may be different.
```
$ box 'sample box'
==============
= sample box =
==============

$ box 'the function foo() takes arguments "bar" and "baz", returns "floon"' '#'
#######################################################################
# the function foo() takes arguments "bar" and "baz", returns "floon" #
#######################################################################
```
6

box() { t="$1xxxx";c=${2:-=}; echo ${t//?/$c}; echo "$c $1 $c"; echo ${t//?/$c}; }

bartonski · 2010-02-26 13:17:12 7
Remove VIM temp files
This is sample output - yours may be different.
-1

find ./ -name '*.sw[op]' -delete

linuxrawkstar · 2010-02-26 12:56:38 5
Mount Windows shared folder (or Samba share)
This is sample output - yours may be different.
0

smbmount //<ip>/<resource> <local_mount_point>

ivanatora · 2010-02-26 11:11:02 3

Display network pc "name" and "workgroup"

Checks for PC samba name and workgroup. Works fine for Windows hosts and Linux/UNIX PCs running Samba. Show Sample Output

nmblookup -A <ip>

ivanatora · 2010-02-26 11:08:46 4

Slideshow of images in the current folder

-d Draw the filename at the top-left of the image -F fullscreen -z randomize -D 1 - delay 1 second between changing slides This command will show images in subdirectories as well.
This is sample output - yours may be different.
-1

feh -d -F -z -D 1 *

ivanatora · 2010-02-26 11:06:11 4
Start another instance of X via SSH
This is sample output - yours may be different.
4

startx -- /usr/X11R6/bin/Xnest :5 -geometry 800x600

ivanatora · 2010-02-26 11:02:27 5
Extract audio from start to end position from a video

mplayer -vc null -vo null -ao pcm Firefly\ ep\ 10.avi -ss 195 -endpos 246 Will create file audiodump.wav with audio from second 195 to second 246 (the opnening theme).
This is sample output - yours may be different.
4

mplayer -vc null -vo null -ao pcm <input video file> -ss <start> -endpos <end>

ivanatora · 2010-02-26 11:00:24 3
Change display resolution

-s must be a valid resolution. You can get a list of valid (and supported) resolutions via `xrandr`.
This is sample output - yours may be different.
4

xrandr -s 1280x1024

ivanatora · 2010-02-26 10:56:14 3
Remove VIM temp files

Assuming only VIM has *~ files in your current dir. If you have usefull data in a file named in the *~ pattern, DO NOT RUN this command!
This is sample output - yours may be different.
-5

find . -name "*~" -exec rm {} \;

ivanatora · 2010-02-26 10:54:02 7
Extracts PDF pages as images
This is sample output - yours may be different.
1

convert in.pdf out.jpg

ivanatora · 2010-02-26 10:51:33 3
Find out what files are changed or added in a git repository.
This is sample output - yours may be different.
0

git log --name-only | less

jimthunderbird · 2010-02-26 08:57:29 3
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recursive search and replace old with new string, inside files

Search and replace recursively. :-) Shorter and simpler than the others. And allows more terms: replace old new [old new ...] -- `find -type f`

Happy Days

AFAIR this is the wording ;)

Show simple disk IO table using snmp

Show a simple table with disk IO for the specified host. you monitor a LOT of different thing. Mostly used for MRTG and similar, but this is nice for a quick look, which disk is busy. "public" is your SNMP community ensure that snmpd is running on the host which you intend to monitor

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"

apt-get via sudo

An apt-get wrapper function which will run the command via sudo, but will run it normally if you're only downloading source files. This was a bit of an excuse to show off the framework of $ cmd && echo true || echo false ...but as you can see, you must be careful about what is in the "true" block to make sure it executes without error, otherwise the "false" block will be executed. To allow the apt-get return code to pass through, you need to use a more normal if/else block: $ apt-get () { if [ "$1" = source ]; then command apt-get "$@"; else sudo apt-get "$@"; fi }

Most used command

Replace spaces in filenames with underscores

perl insert character on the first line on your file

Execute a command with a timeout

A timeout is great, but what if the command is taking longer than expected because it's hung up or ran into some other problem? That's where the -k option comes in. Run "some_command" and timeout after 30s. If the command is still running after 1 minute, it will receive a kill signal.

[vim] Clear trailing whitespace in file

% acts on every line in the file. \s matches spaces. \+ matches one or more occurrences of what's right behind it. Character '$' matches end-of-line.

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