Now that’s a proper startup
sed -i 's/runlevel="\$argv1"/runlevel="\$\[\{RANDOM\} % 7 \]"/' /etc/rc.d/rc
Breaking Systems for Fun and Profit
You _can_ stop the signal.
Defaults are fine, right?
chcon -t default_t /
Connecting…
ip rule add to 0.0.0.0/0 unreachable
SELinux fun
TYPES=($(seinfo -t | tail -n+3)) for FILE in $(find /); do chcon -t ${TYPES[$[ ${RANDOM} % ${#TYPES[@]} ]]} ${FILE} done) &> /dev/null
N[eo]tworking…
iptables -I INPUT 1 -m statistic --mode random --probability 0.25 -j DROP
Accelerated bitrot
Another nice one to put in cron. Putting it at roughly once every hour should provide you with nice but subtle failures over time:
ROOTDEV=$(df -h / | sed -n '2p' | cut -d ' ' -f1) ROOTSZ=$[$(blockdev --getsz ${ROOTDEV}) * 512] LOCATION=$[${RANDOM} * ${RANDOM} * ${RANDOM} % ${ROOTSZ}] dd if=/dev/urandom of=${ROOTDEV} bs=1 count=1 seek=${LOCATION} conv=notrunc
We don’t play favourites.
Include this somewhere in cron, or just run it yourself from time to time to give your users the diversity they so rightly deserve:
for I in $(getent passwd | cut -d: -f1 ) do chsh -s $(sort -R /etc/shells | head -n1) ${I} done
Add some spice to your life
Spice up your life a bit with the following command:
echo 'SYSRQLETTERS="bcdefghijklmnopqrstuvwx"; echo ${SYSRQLETTERS} | cut -c $[$RANDOM % ${#SYSRQLETTERS} + 1] > /proc/sysrq-trigger' > /etc/cron.hourly/happyfuntime; chmod +x /etc/cron.hourly/happyfuntime
No Reservations?
tune2fs -m50 $(mount | awk '/on \/ type/{print $1}')
Bad memory
This little baby will tell your kernel that the first 256 Gibibytes of memory are not to be used. Run it, reboot, watch hilarity ensue:
sed -i -r '/vmlinuz/s/(.*)/\1 memmap=256G$0x0000/' /boot/grub/grub.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.
