Search Order for TNS files - listener.ora, sqlnet.ora, tnsnames.ora ..etc.
Last updated on MAY 07, 2018
Applies to:Oracle Net Services - Version 22.214.171.124 to 126.96.36.199 [Release 9.2 to 12.2]
Note that this does not apply to Enterprise Manager which searches ORACLE_HOME/network/admin unless TNS_ADMIN is set.
The goal of this document is to explain how Oracle Net searches for the configuration files listener.ora, sqlnet.ora, tnsnames.ora and cman.ora.
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