invoke-rc.d: policy-rc.d denied execution of stop. , dpkg: error processing package mysql-server-8.0 error on Ubuntu 20.04

ubuntu_error_fix.md

For forcefully purging the package.

Since removing packages can be destructive, print the list of the package that will be removed:

dpkg -l | awk  '{print $2}' | grep -i mysql | grep -v lib

Check if any important package is being removed. If everything seems fine, proceed to step 2.

Purge the packages:

sudo dpkg -P  --force-all $(dpkg -l | awk  '{print $2}' | grep -i mysql | grep -v lib)