How to fix the Oracle error ORA-06144: NETTCP: SID (database) is unavailable?

In this post, you’ll learn more about the Oracle ErrorORA-06144: NETTCP: SID (database) is unavailable with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-06144: NETTCP: SID (database) is unavailable

Reason for the Error ORA-06144: NETTCP: SID (database) is unavailable

The database administrator on the host has varied the SID offline.

How to fix the Error ORA-06144: NETTCP: SID (database) is unavailable ?

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

Wait for it to be varied back on-line.