Failed to restart mysql.service: Unit mysql.service is masked in Ubuntu 20.04 after an upgrade from 18.4

I upgraded my ubuntu from ubuntu 18.04 to ubuntu 20.04. On running my MySQL via the terminal, I am not able to access my DBS on running the command

 service MySQL start

I get the error message

Unit mysql.service is masked.

Does this answer your question? Failed to start redis.service: Unit redis-server.service is masked

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In addition to being a duplicate, this is a question about server administration, not programming. 

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If you are receiving the error message

MySQL services are masked

I simply solved mine by running the below code

systemctl unmask mysql.service

Then restart your MySQL

service mysql start

Yes but, why was it masked? 

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2Currently we can say its an upstream error while moving from any version of MySQL lower than MySQL version 8.X – stanley mbote Dec 7, 2020 at 11:44

2I have used mysql for the better part of my coding experience and I have had a fair deal of issues with it but thanks to the support from the community I have always found work around. – stanley mbote Jun 16, 2021 at 16:00

source : https://stackoverflow.com/questions/65092669/failed-to-restart-mysql-service-unit-mysql-service-is-masked-in-ubuntu-20-04-af