Anyway to Detect all Installs of Oracle Throughout a Domain ?

Question

hi experts,
I have been tasked with presenting a list of all the versions of Oracle that are installed on any of our servers.
I know we have some Oracle 7.9 databases and some Oracle 10g databases and probably others.
Is there a command or a script you may have that reports the names of the servers that have Oracle installed - or even better, the names of the database/instance too ?
If you have something that will work for Windows networks that would help. We also have Oracle installed on UNIX as well.
Thanks for any ideas. John

Answer 1

Just searching on port 1521, though, will only show you systems where a listener is running and where it is listening on the default port. It is relatively common to run an Oracle listener on a port other than 1521 or to have multiple listeners on multiple ports for the same system, etc.
If the remote listener is password protected, you'd need to know the password in order to get information from lsnrctl remotely, which would tend to imply that this was an installation you were already familiar with...
What is the purpose of doing this particular inventory? If you're trying to do an audit for license purposes, for example, you're likely to be far more concerned with some of these corner cases than if you're just trying to produce some documentation about known production databases...
Justin