In this article, we will describe step by step of how to upgrade Oracle Enterprise Manager 12c R2 (12.1.0.2) to Oracle Enterprise Manager 12c R3 (12.1.0.3) running on Red Hat el5 64 bits. First of all, you need to download the installation files and place in you machine: [oracle@ec12mntrjr001 em12cR3]$ ls -la total 5942464 drwxr-xr-x …
