APT isn't able to upgrade mySQL for me. I believe the 1045 error is due to login details. I'm able to run mysql_upgrade -uroot -p and finish it manually but how do I tell apt that it's done, please stop trying?
Setting up mysql-server-5.7 (5.7.24-0ubuntu0.16.04.1) ...
update-alternatives: warning: forcing reinstallation of alternative /etc/mysql/mysql.cnf because link group my.cnf is broken
update-alternatives: warning: not replacing /etc/mysql/my.cnf with a link
mysql_upgrade: Got error: 1045: Unknown error 1045 while connecting to the MySQL server
Upgrade process encountered error and will not continue.
mysql_upgrade failed with exit status 11
dpkg: error processing package mysql-server-5.7 (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
mysql-server depends on mysql-server-5.7; however:
Package mysql-server-5.7 is not configured yet.
dpkg: error processing package mysql-server (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
mysql-server-5.7
mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
subprocess installed post-installation script returned error exit status 1
: read my answer from this related problem https://askubuntu.com/questions/760724/16-04-upgrade-broke-mysql-server/793545#793545 – knb Oct 24 '18 at 19:38