How to find Oracle instance names?


Pls kindly advise how I can find out which Oracle instances and Database exist
in UNIX Server. For a Server with multi-instance, I want to know the
combination of instance/database name (even they haven't started up).



Ans1:
/etc/oratab list all the instances on the machine.

Rene



Ans2:

To find which database are currently runing, for example :

$ ps -ef | grep pmon

For each process :
ora_<process_name>_<instance_name>
 

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