Migrating Centos 5 to Centos 6
I'm am planning on a multi-site Drupal 7 install which prefers php5.3.
I know that 5 still has a couple years for EOS but I might as well get started using the newer code base.
I currently host an active Apache server and Dovecot and Postfix. I can't afford much downtime on the email side.
Can the upgrade be done in place? Or should I start a new linode with the newer Centos distro and reinstall every thing and then copy all the datafiles across?
I currently run my own business from the server so I am the only one that suffers from the downtime.
Thanks!