I faced this error after trying to install mongodb on ubuntu 16.10

Question

When trying to install mongodb on ubuntu 16.10

When I type this:

$ sudo systemctl start mongodb
Failed to start mongodb.service: Unit mongodb.service is masked

I have followed all the steps on the following link.

Answer 1

The error tells you the service is masked, which means it isn't allowed to start. Run sudo systemctl unmask mongodb to unmask it.