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Remove all unused kernels with apt-get
This should do the same thing and is about 70 chars shorter.

find text in a file
this will find text in the directory you specify and give you line where it appears.

Extract the emoticons regex from a running skype process
Skype has an internal regex which depicts the emoticons it supports. However you cannot simply search the binary file for it. This small 181 character line will do just that, provided skype is running. And of course, only works in linux.

Rename files in batch

repeat a command every one second
Short method of "while x=0; do foo ; sleep 1 ; done"

find files in a date range
Example above will recursively find files in current directory created/modified in 2010.

count how many times a string appears in a (source code) tree
grep -o puts each occurrence in a separate line

List all installed PERL modules by CPAN
This command will give you the detailed information about the installed perl modules i.e. installed path, Link type, version, files etc.

open remote desktop connection without X
You can use it to connect to remote windows machine and start some scritps that need user login

Video Google download
Download google video with wget. Or, if you wish, pass video URL to ie mplayer to view as stream. 1. VURL: replace with url. I.e. http://video.google.com/videoplay?docid=12312312312312313# 2. OUPUT_FILE : optionally change to a more suited name. This is the downloaded file. I.e. foo.flv # Improvements greatly appreciated. (close to my first linux command after ls -A :) ) Breakedown pipe by pipe: 1. wget: html from google, pass to stdout 2. grep: get the video url until thumbnailUrl (not needed) 3. grep: Strip off everything before http:// 4. sed: urldecode 5. echo: hex escapes 6. sed: stipr of tailing before thumbnailUrl 7. wget: download. Here one could use i.e. mplayer or other...


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