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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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Big (four-byte) $RANDOM

Sometimes, in a shell script, you need a random number bigger than the range of $RANDOM. This will print a random number made of four hex values extracted from /dev/urandom.

list block devices

Shows all block devices in a tree with descruptions of what they are.

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

Converts uppercase chars in a string to lowercase

Another alternative is to define a function: lower() { echo ${@,,} } lower StrinG

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Test file system performance

You need bonnie++ package for this. More detail than a simple hdparm -t /dev/sda would give you. the -d is the directory where it performs writes/reads for example I use /tmp/scratch with 777 permissions Bonnie++ benchmarks three things: data read and write speed, number of seeks that can be performed per second, and number of file metadata operations that can be performed per second.

move all files older than 60 days to a folder

Get last sleep time on a Mac

Run netcat to server files of current folder

urldecoding with one pure BASH builtin

You can use ordinary printf to convert "%23%21%2fbin%2fbash" into "#!/bin/bash" with no external utilities, by using a little known printf feature -- the "%b" specifier converts shell escapes. Replace % with \x and printf will understand the urlencoded string. BASH's printf has an extension to set a variable directly, too. So you get to convert urlencoded strings from garble to plaintext in one step with no externals and no backticks.

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