I will go through these. Thanks for quick response @arunpatidar these will be helpful.  

Hi All,We have our On-Prem AEM 6.5 SP 19 running on CentOS 7 (AWS ec2 server) As the CentOS7 reached the End of Life we need to plan for the upgrade to either OEL 8 or RHEL 8 What will the recommended OS be, And would it be compatible to make an In Place upgrade from CentOS 7 ->  OEL 8 or RHEL 8 Ple...