I thought I had posted this but it doesn't seem to have gone through. If this is a duplicate, apologies.
I have been asked to upgrade a development server, not to the latest release but to match the version of another server for testing. After upgrading MySQL to 5.5.44 everything works as expected except after rebooting the server mysqld must be started manually.
The upgrade was performed as below:
yum replace mysql-libs --replace-with mysql55w-libs
yum install mysql55w mysql55w-server
A contractor originally installed the server, they may have been following this guide -
http://www.shayanderson.com/linux/complete-centos-65-server-install-with-web-server-and-mysql-server.htm
The actual service being supported here is a VLE system called Moodle. I have read through the documentation there, looked through the logs etc. and tried what has been suggested. I don't have anything left to investigate after fixing the warnings/errors encoutered so far, "mysql_update" has been run for example.
This is my first experience with MySQL so I would appreciate any help. Thanks in advance.