MySQL upgrade on Ubuntu - any heads ups?
The upgrade process depends on how you installed your mysql distribution.

If you installed the ubuntu mysql distribution you don't need to upgrade that way (but always create the backup copy of all your dbs!). You need to upgrade that way only if you installed the mysql.com mysql distribution (ex. tar.gz).

If you installed mysql packages distributed by ubuntu (you can check it running dpkg -l | grep -i mysql-server) you may just need to use the ubuntu package manager to upgrade mysql.