How to fix the Oracle error TNS-01203: Missing the account (string) specified by DEFAULT_USER_ACCOUNT in SID_DESC?

In this post, you’ll learn more about the Oracle ErrorTNS-01203: Missing the account (string) specified by DEFAULT_USER_ACCOUNT in SID_DESC with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

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

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

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

How to fix the Error TNS-01203: Missing the account (string) specified by DEFAULT_USER_ACCOUNT in SID_DESC ?

You can fix this error in Oracle by following the below steps

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 the connecting client has database privileges or does not exist on this machine.