$ shutdown -h now

Only a disaster when orchestrated to run on all the clusters when using RAM-only databases.
Otherwise there normally isn't any data loss and a company that can't buffer a few minutes of downtime should straight up close doors anyways.

@Oktokolo a few minutes is an eternity in high-frequency trading and the like

@RememberMe
Well, that is the sort of business which's disappearance would actually improve humanity anyway...