The first update for pool_check has just been pushed to GitHub:
Now it features hourly (or less, defined in cron) tests on:
Checking:
is cardano-node running?
is the load average of my server too high?
did my server configuration change?
If it does:
you can specify an email adress that receives an error message so you know someone is messing with your server or cardano node crashed
The script is 100% pure bash - so it’s compatible along Linux and readable - check for yourselves 
Info on how to get and setup the script is specified here: https://github.com/stablepool/pool_check/blob/master/README.md