5.2 -> 5.3 without single mode?

[dima]

> Is it possible to cvsup from 5.2 to 5.3 without booting in single mode?
> I have a remote machine and want update it, but it is no console access,
> only SSH.
You don't actually need to reboot in single-user mode. Just make sure your users wouldn't use the server hard during the
# mergemaster -p
# make installworld
# mergemaster
cycle. You can basically disable all the services but sshd for that task & enable them again after the second reboot.