>From your log:

ERROR: Unable to start MySQL server:
2020-10-25T14:13:25.927849Z 0 [ERROR] unknown variable 
'log_slow_queries=/var/log/mysql/mysql-slow.log'
2020-10-25T14:13:25.932353Z 0 [ERROR] Aborting
Please take a look at https://wiki.debian.org/Teams/MySQL/FAQ for tips on 
fixing common upgrade issues.

This is a confirugation error that the newer version doesn't support anymore.
Answered plenty of times on the internet like (my first find) 
https://stackoverflow.com/questions/20136926/why-does-log-slow-queries-break-my-cnf

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1901411

Title:
  package mysql-server-5.7 5.7.31-0ubuntu0.16.04.1 failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 1

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/mysql-5.7/+bug/1901411/+subscriptions

-- 
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to