I have a linux box on a KVM - a few times I’ve switched over to it and done the ctrl+alt+del by accident (expecting an NT login) - and Unfortunately on fedora out of the box this shuts the machine down - not very good in office hours!

So I found this useful

In /etc/inittab

    # Trap CTRL-ALT-DELETE
    #ca::ctrlaltdel:/sbin/shutdown -t3 -r now
    ca::ctrlaltdel:/bin/echo “ctrl+alt+del disabled”

No more accidental reboots….