TNS-01203: Missing the account (string) specified by DEFAULT_USER_ACCOUNT in SID_DESC

Cause: The unprivileged operating system account is missing from /etc/passwd.

Action: Check the DEFAULT_USER_ACCOUNT parameter in the SID_DESC in LISTENER.ORA and verify it has a valid entry in /etc/passwd. This is the account that the Oracle shadow process will be started with if the connecting client has database privileges or does not exist on this machine.

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