VirtualBox is a virtualization platform that will allow you to run other operating systems under ClearOS.

You must have a graphical environment on ClearOS Enterprise before installing VirtualBox. Install KDE or Gnome before continuing.

VirtualBox will want to build some packages, you will need the current kernel sources for this to work.

yum install gcc
yum install kernel-devel
yum install kernel-headers

-or-

yum install gcc
yum install kernel-headers-2.6.32-131.6.1.v6.x86_64.rpm 
yum install kernel-devel-2.6.32-131.6.1.v6.x86_64.rpm 

You will need to download the software for VirtualBox. This can be obtained from their website.

One method is to use wget:

mkdir /root/support && cd /root/support
yum -y install wget
wget http://download.virtualbox.org/virtualbox/4.1.2/VirtualBox-4.1-4.1.2_73507_rhel6-1.x86_64.rpm

Install the software using yum:

yum install VirtualBox-4.1-4.1.2_73507_rhel6-1.x86_64.rpm

There may be several dependencies, if you have a proper repository, these will resolve correctly.

Launch VirtualBox within XWindows by running the following from xterm

VirtualBox

yum erase VirtualBox-4.1