Upgrading to Ubuntu 15.04
by Kasper Tidemann
Ubuntu 15.04 was released a couple of days ago and with that came some changes. If you’re on the 14 branch, you’re probably using Upstart for running your jobs.
While Upstart is still available, it was ditched in favor of Systemd in Ubuntu 15.04. This means that after a successful do-release-upgrade, you’ll see none of your Upstart scripts running.
The quick fix is to install Upstart again on your server via apt-get install upstart-sysv. Alternatively, you may wish to convert your scripts to Systemd – for this, the Ubuntu Wiki contains some useful information.