[otrs] Otrs ticketsystem transfer to other server

Hello, I need, to transfer my acctual OTRS installation, to the new server. Previously the OS on the otrs machine was Debian. Now It's CentOS. Alternatively I can use tthe other Debian machine, but it's as a last resort. So.. what do you suggest, how to do it without problems? Mabe I need to do a new install of otrs, and rsync few files and the database? -- Regards Grzegorz Dajuk