Met INS-08101 when I installed Oracle database 19c on Oracle Linux 8 update 2.
[INS-08101] Unexpected error while executing the action at state: 'supportedOSCheck'
This is because Oracle database 19.3 supports Oracle Linux up to 8.1, not 8.2.
To solve INS-08101 'supportedOSCheck', we trick OUI to think the operating system is release 8.1 by using an environment variable CV_ASSUME_DISTID, either temporarily or permanently.
At runtime, we can export the variable.
[oracle@ora19c dbhome_1]$ export CV_ASSUME_DISTID=OEL8.1
Or we can set the variable in the CVU configuration file.
[oracle@ora19c dbhome_1]$ vi $ORACLE_HOME/cv/admin/cvu_config
Now we can run OUI again.