Installing Mongodb to Ubunto16.04 —
after sudo systemctl status mongodb cli returned
● mongodb.service Loaded: masked (/etc/systemd/system/mongodb.service; masked; vendor preset: e

I searched and found a similar issue on stackexchange with the solution of "just unmask"

I did this -- and then uninstalled and reinstalled mongodb and now when I sudo systemctl status I get:

● mongodb.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)

Happy to provide more information. This is my first time ever asking a development question on the interwebs...