Endian Firewall Linux $1 redhat-linux $1+10.0 `cat /etc/endian-release 2>/dev/null` =~ /release\s+(\S+)/
Oracle Enterprise Linux $2 redhat-linux $2+8.0 `cat /etc/enterprise-release 2>/dev/null` =~ /Enterprise.*Linux\s+Enterprise\s+Linux\s+Server\s+release\s+(\d+)/i
Oracle VM $2 redhat-linux $2+8.0 `cat /etc/ovs-release 2>/dev/null` =~ /Oracle.*VM\s+server\s+release\s+(\d+)/i
+XenServer Linux $1 redhat-linux 13.0 `cat /etc/redhat-release` =~ /XenServer\s+release\s+5\./
# Redhat enterprise versions
Redhat Enterprise Linux 2.1AS redhat-linux 7.3 `cat /etc/redhat-release 2>/dev/null` =~ /(Advanced\s+Server.*2\.1)|(AS.*2\.1)/i