On my Ubuntu Server 18.04 (originally installed as 14.04 and upgraded to 18.04 few months ago), systemd update has now been "kept back".
I looked at it in aptitude and it says that dependencies are not satisfied:
- systemd(upgrade, 237-3ubuntu10.29 -> 237-3ubuntu10.31) conflicts with upstart
I know Ubuntu used to use upstart but have no idea if my installation still uses it or if it's safe to remove it. It's a production server. I can have down time only during weekend. I would very much like to avoid breaking it by messing with the boot process.
What should I do and how?