The Arch wiki is a great learning place.
While LDAP/Samba are the canonical answers for "what is the AD equivalent for Linux", I would also like to point out that you could save yourself the time to maintain this by using an AD SaaS solution like Jumpcloud or similar that supports Linux. Given that you said it's for a church with about 10 computers, there might be a discounted or even free option (eg under the nonprofit category).
Use -m
and limit the build job's memory so it doesn't kill the docker daemon.
Proud of Canada for making it this far! No shame in losing against the current champions.
Strawberrum? Barely knew 'em!
shitdown -h now
rapid mitosis
As in you are seeing multiple boot entries? It's likely one entry per kernel version that you have installed. It doesn't happen often these days any more, but in some situations it's handy to be able to revert to a previous kernel if for example third party modules break.
Sure they can. If you put a network behind a router they will share an egress/ingress IP. And there are certain high availability setups where computers share IPs in the same subnet for hot/standby failover.
They are also not a common fixture of garages.
GNU STP.