There are a couple of different ways you can verify you are running Oracle Application Server 10.1.2.3. Perhaps the simplest is to navigate to the EM Consile about page typically found at:
Another option is to use oPatch by running the following command:
[ORACLE_HOME]/opatch/opatch lsinventory -detail
Then, navigate to
[ORACLE_HOME]/.patch_storage and look for the latest log file. You will have a full listing of products installed in your
If you have just upgraded Oracle Portal to 10.1.4.2 and want to verify its version as well, you can simply navigate to
Portal Administer tab > Global Settings.