runInstaller-Checking operating system version: must be redhat-2.1AS, redhat-3 or redhat-4 Failed

While executing runInstaller below error coming. 

[applmgr@test install]$ ./runInstaller

Starting Oracle Universal Installer...

Checking installer requirements...

Checking operating system version: must be redhat-2.1AS, redhat-3 or redhat-4

                                      Failed <<<<

Exiting Oracle Universal Installer, log for this session can be found at /etc/oraInventory/logs/installActions2020-07-08_12-41-34PM.log

Here we need to edit oraparam.ini under /Disk1/install.

after edit the oraparam.ini file must be verify as below.

[applmgr@test install]$ diff oraparam.ini oraparam.ini_bkp

46c46

< Linux=redhat-2.1AS,redhat-3,redhat-4,redhat-5,redhat-6

---

> Linux=redhat-2.1AS,redhat-3,redhat-4

Finally it passed and met all installer requirement.

[applmgr@acetest install]$ ./runInstaller

Starting Oracle Universal Installer...

Checking installer requirements...

Checking operating system version: must be redhat-2.1AS, redhat-3, redhat-4, redhat-5 or redhat-6

                                      Passed

All installer requirements met.