Failed to start mongod.service: Unit mongod.service not found

Question

I follow all the steps mention in MongoDB installation documents for Ubuntu 16.04.

Steps 1:

sudo apt-key adv --keyserv         


        

Answer 1

For those that run into this and end up on this answer, as I did, where they got this error during uninstall orupgrade and Ubuntu keeps failing to uninstall the previous because the service doesn't exist this one line will get you past that and allow the uninstall or upgrade to continue.

sudo touch /lib/systemd/system/mongod.service