INS-08101 Unexpected error while executing the action at state: 'supportedOSCheck'

Environment: 

Oracle 19c Installation on OEL/RHEL 8

Error: 

INS-08101 Unexpected error while executing the action at state: 'supportedOSCheck'

Cause: 

When Oracle 19c was released, RHEL8/Oracle Linux 8 was not released and hence the Oracle Installer does not contain the prerequisites checks for RHEL8/Oracle Linux 8 and hence this is expected error during Oracle 19c installation on OEL8/RHEL8 Operating system.

Solution: 

By oracle user, set below environment variable or set this in .bash_profile for oracle user and execute "./runInstaller" again. This will assume that the installer OS is Linux 7.

export CV_ASSUME_DISTID=OL7

./runInstaller

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