I am seeing the “failed to start metasploit.service: unit metasploit.service failed to load” error. How do I solve it?

I have been trying to setup Metasploit for penetration testing.

However, I am unable to get the database to connect. Also whenever I attempt to start the service using service metasploit start I get the following error:

“failed to start metasploit.service 

unit metasploit.service failed to load 

no such file or directory”

I find this odd because I am able to run the program using:

Msfconsole I haven't been able to find any solutions online yet, can anyone here help me out?