And hence under no circumstances one should ship a code that just doesn’t do what it’s supposed to do in the first place, we know the cloud doesn’t use it much, but c’mon it’s a critical part of the system.
D'oh
sudo shutdown
Linux: I give a damn about you're super critical nuclear reactor loading up, this computer is going down NOW
It would actually be sudo shutdown -h now. Otherwise it waits a few minutes for the control rods to drop before it shuts off the coolant control.
That's quite interesting, considering that -h flag is usually related to showing help.
That still does stuff like unmounting filesystems (which can take a minute with snap, if they haven't fixed it), you can go further with the (rather unsafe) SysRq key "o", which tells the kernel to shut down without any preparation.
Systemd: “A stop job is running for User Manager for UID 1000 (1s / 2min)”