Fix mysql 5.7 issue on Ubunut 20.0

I need to fresh install mysql 5.7 currently it is installed on Ubuntu 20.0 server but it is not working. I want either a fresh install of mysql 5.7 or fix the current issue.

I am getting the below error

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)