Is there any way to check which Oracle products are installed (in use) on a UNIX Oracle DB server
We have several different DBs running across 3 UNIX servers - I am looking to see what products are installed on each, and if possible, which are actively in use (some may have been installed by default). The Enterprise Edition on all servers is 19.0.0.0.0; the databases are 11g, 12c or 19c.
Many thanks.