runcluvfy.sh command gets hung on 19c before Grid Installation

 When you are running pre-check for cluster installation using runcluvfy command in 19c to install on RHEL 8 operating system, it gets hung and does not generate any report.

[grid@sajidserver01 19000]$ ./runcluvfy.sh stage -pre crsinst -n sajidserver01,sajidserver02 -verbose==>hangs

To get the detailed output, you can follow the below workaround. By setting an environment variable.

[grid@sajidserver01 19000]$ export CV_ASSUME_DISTID=OL7
[grid@sajidserver01 19000]$ ./runcluvfy.sh stage -pre crsinst -n sajidserver01,sajidserver02 -verbose

     | |  | |  | |
     | |  | |  | |
     | |  | |  | |   Output is Truncated
   \                /
     \            /
       \        /
         \    /
           \/

CVU operation performed:  stage -pre crsinst
Date:  Aug 6, 2021 11:55:22 PM
CVU home:/usr/app/grid/product/19000/
User: grid

Hope this helps with Grid 19c RAC builds.