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find listening ports by pid
change 24073 to your pid

The NMAP command you can use scan for the Conficker virus on your LAN
This was posted on reddit. replace 192.168.0.1-256 with the IP's you want to check.

Listing directory content of a directory with a lot of entries
Ever wanted to get the directory content with 'ls' or 'find' and had to wait minutes until something was printed? Perl to the rescue. The one-liner above(redirected to a file) took less than five seconds to run in a directory with more man 2 million files. One can adapt it to e.g. delete files that match a certain pattern.

Url Encode
This one uses hex conversion to do the converting and is in shell/sed only (should probably still use the python/perl version).

Binary clock
Fun idea! This one adds seconds and keeps running on the same line. Perl's probably cheating though. :)

remove oprhan package on debian based system

Recompress all .gz files in current directory using bzip2 running 1 job per CPU core in parallel

list files recursively by size

UPS Tracking Script

Count occurrences per minute in a log file
The cut should match the relevant timestamp part of the logfile, the uniq will count the number of occurrences during this time interval.


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