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Random unsigned integer
Reads 4 bytes from the random device and formats them as unsigned integer between 0 and 2^32-1.

Google URL shortener
Use curl and sed to shorten an URL using goo.gl without any other api

list files recursively by size

Get your public ip

Listen to a file
replace "/usr/src/linux/kernel/signal.c" with any file you want and listen to its output ! :P you can also replace "cat" with "echo" or anything you can come up with have fun :-}

Convert encoding of given files from one encoding to another

Generate random valid mac addresses
Python Alternative

Count accesses per domain
count the times a domain appears on a file which lines are URLs in the form http://domain/resource.

add static arp entry to default gateway, arp poison protection


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