uname -a
 yum install yum-plugin-priorities
 wget http://mirror.kiewel-online.ch/epel/6/i386/epel-release-6-8.noarch.rpm
 yum install wget
 wget http://mirror.kiewel-online.ch/epel/6/i386/epel-release-6-8.noarch.rpm
 yum localinstall epel-release-6-8.noarch.rpm
 yum install http://mirror.kolabsys.com/pub/redhat/kolab-3.0/el6/development/i386/kolab-3.0-community-release-6-2.el6.kolab_3.0.noarch.rpm  http://mirror.kolabsys.com/pub/redhat/kolab-3.0/el6/development/i386/kolab-3.0-community-release-development-6-2.el6.kolab_3.0.noarch.rpm
 yum install kolab