What are the steps you are doing to move whole cpanel server to different machine? while keeping minimum downtime to hosted websites.

I found following useful tutorial: https://documentation.cpanel.net/display/CKB/How+to+Move+All+cPanel+Accounts+from+One+Server+to+Another

I think it is about preparing secondary server and then transferring accounts.

Beside that one can do mysqldump to keep database in sync. rsync was not advised because of possible InnoDB corruption

- Was /etc/my.cnf; suspended page template; virtualhost include also restored or need to copy config. manually?

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Here is also how i move OpenVZ VPS: https://internetlifeforum.com/showthread.php?t=2484