User`s guide

Along with upgrading the Parallels Virtuozzo Containers software, you may also wish to upgrade
the Host operating system (Host OS) installed on your server. The following table lists the types of
Host OS+Parallels Virtuozzo Containers (both Virtuozzo 3.0 Service Pack 1 and Parallels Virtuozzo
Containers 4.0 or 4.6) upgrades officially supported in Parallels Virtuozzo Containers 4.7:
Host OS before upgrade Host OS after upgrade
CentOS 4 CentOS 6 (recommended)
CentOS 5
Red Hat Enterprise Server 4 Red Hat Enterprise Server 6 (recommended)
Red Hat Enterprise Linux 5
The procedure of upgrading Host OSs slightly differs depending on the Virtuozzo version installed
on the server and is described below.
In This Chapter
Upgrading a Host OS with Virtuozzo 3.0 ................................................................. 12
Upgrading a Host OS with Parallels Virtuozzo Containers 4.0 or 4.6 ........................ 14
C HAPTER 5
Upgrading Host Operating Systems with
Parallels Virtuozzo Containers