I just did the above mentioned upgrade but it seems like systemd is not working as it should. If I run a command like systemctl start apache2
I get the message
Failed to connect to bus: No such file or directory
Oddly service apache2 start
is still working. I had to start the upgrade twice because something went wrong the first time I did, so I think it might have something to do with that.
Is there a way to manually switch from upstart to systemd while maintaining all working services?