Despite the potential of Oracle Management Cloud, I’m a fan of Oracle Enterprise Manager, with its small imperfections. So when noticing a 12c Oracle Enterprise Manager on Linux, and targets on Windows, I took the challenge of modernizing the customer’s environment a bit. And the starting point , 22.214.171.124 for OMS and 126.96.36.199 database as repository wasn’t that bad at all. This post is purely about upgrading the OMS. Upgrading agents is a different story with Windows as target.