Upgrading to Oracle 12c - Expert Consolidation in Oracle Database 12c - page 420

All other screens from the installation are not very different from the “clean” installation of the software on a new
server. When you initiate the upgrade then the following tasks are executed on your behalf:

• Prepared the dependent objects for the upgrade.

• Copied files to the new Oracle Restart home.

• Linked the binaries.

• Updated the repository.

The interesting events start to unfold when you are prompted to execute the upgrade script, which is shown in
Figure 12-5 :

Figure 12-5. The prompt for the execution of the rootupgrade.sh script

As always with Oracle upgrades, execution of the root script is where it gets exciting. Either execute the command
yourself, or have the sys admin execute it for you should you not have root access. Whichever is the case, you should
double-check that no environment variables point to any Oracle home-neither the old nor new one. This could
potentially confuse the upgrade scripts. A sample execution of the script is shown here. Note that existing files in the