The following files need to be modified to reflect the hostname change:
So that they reflects the proper hostname in this string:
(ADDRESS= (PROTOCOL = TCP) (HOST= <hostname>)(PORT = 1521))
Please review How to change the hostname of the eHealth server for further details on hostname changes.
Error starting oracle after hostname change
Error: "TNS-12545: Connect failed because target host or object does not exist"
(Legacy KB ID CNC TS14057 )