Linux migration to new version

https://linuxhint.com/upgrade_rhel7_rhel8/

• install leapp packages leapp leapp-deps python2-leapp leapp-upgrade-el7toel8 leapp-upgrade-el7toel8-deps

• if you are accessing Red Hat CDN using a proxy server, define the $LEAPP_PROXY_HOST

• leapp preupgrade

• leapp preupgrade –target <target_os_version>

• leapp upgrade –target <target_os_version>