Oracle® Database 11g / 12c / 18c error codes ORA-12164: TNS:Sqlnet.fdf file not present

ORA-12164: TNS:Sqlnet.fdf file not present

Oracle Error Code: ORA-12164

Cause: The sqlnet.fdf file doesn''t exist in $ORACLE_HOME/network/admin.

Action: The sqlnet.fdf file is required for Oracle Tracing to occur. Either install the sqlnet.fdf file in $ORACLE_HOME/network/admin or turn off tracing in your ORA file.