Hello @Bharath9 !
Thanks for reaching out! This forum is not a Red Hat product support forum so please exercise caution in implementing any advises or inputs you got here into your production environment. You need to open a product support case with Red Hat and ask for help/ guidance.
As per the Red Hat official doc - upgrading RHEL 6 to 8 is a two stage process : https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/upgrading_from_...
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