Remove evolution-calendar-factory from startup

If you want to remove evolution-data-server, it will remove these at least (tested in 16.04)

The following packages will be REMOVED:
  evolution-data-server gdm3 gnome-contacts gnome-shell libfolks-eds25
0 upgraded, 0 newly installed, 5 to remove and 378 not upgraded.
After this operation, 15.8 MB disk space will be freed.

So, the better treatment is a bit nasty, but it works!

Nasty Hack!

Rename Evolution binary folder, so that it won't be found! What works for me is these

sudo mv /usr/lib/evolution-data-server /usr/lib/evolution-data-server-disabled
sudo mv /usr/lib/evolution /usr/lib/evolution-disabled

That's it! Now, I can at least use the system.

Notes: If you disable evolution this way, you won't be able to use calender syncs or other fancy (useless for me) stuff.

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Less dirty hack (update)

Looks like more and more people are unsatisfied with evolution lately. But in my current setup, I don't rename the folder. Instead I just remove the executable bit and it works.

For disabling calendar process, I used

sudo chmod -x /usr/lib/evolution/evolution-calendar-factory

The good thing with this method is other evolution service can still work (they start and runs)

Repeat the same process for evolution-source-registry and evolution-addressbook-factory if you want to shut them up too!

I didn't have Evolution installed, but still had this running as well.

Remove the package evolution-data-server via the Software Center. Or type this into a terminal: sudo apt-get purge evolution-data-server. Then log out and back in, it should be gone.

N.b. This worked for me in 14.04 and 16.04 if using the Unity desktop; it does not, however, in 18.04, as a lot of critical gnome packages depend upon it

You can mask the units using systemd (tested on Ubuntu 18.04, Unity):

systemctl --user mask evolution-addressbook-factory.service evolution-calendar-factory.service evolution-source-registry.service

After logout/login the services will not be started anymore.