I think the two are a bit orthogonal--but do have some overlap. I recently had a job where I helped out with a bunch of sysadmin stuff. A bunch of the computers

I think the two are a bit orthogonal--but do have some overlap. I recently had a job where I helped out with a bunch of sysadmin stuff. A bunch of the computers had local users and dns entries set locally. The rest of the network used NIS. They also periodically rented computers and didn't have a formal install process or OS image. I also moved while working there and had to do a lot of this remotely. Knowing how all the pieces fit together from doing LFS and how to bootstrap them was really helpful even though we never compiled anything. It also helped when things get wedged (won't boot or a GUI freezes) and you can fix it without having to power cycle the machine, losing work. I haven't taken an OS class or messed around with xv6 (I'd like to), but I think that would help with a different set of things.