reboot yourself

Wondering the same

Edit: after a quick google session it seems like usually the reboot command is linked to systemctl so it should be pretty much the same thing as far as I understand.

reboot is linked (aliased) to your init program. In the case you are using systemd then it's equivalent to systemctl reboot.

reboot is generic and calls whatever init program you use.

There are more than one init. Like for example GNU Shepherd.