For anyone wondering how this works, molly-guard uses package diversions to actually rename the shutdown/reboot/... binaries and replace them with molly-guard:

For anyone wondering how this works, molly-guard uses package diversions to actually rename the shutdown/reboot/... binaries and replace them with molly-guard: https://git.launchpad.net/ubuntu/+source/molly-guard/tree/debian/molly-guard.preinst https://git.launchpad.net/ubuntu/+source/molly-guard/tree/de... This is a cool ability of dpkg that is not well known. You can use it without making a package as well.