https://help.ubuntu.com/community/OpenVZ

root@gateN:~# sudo apt-get install linux-openvz vzctl

root@gateN:~# shutdown -r now

root@gateN:~# uname -a

root@gateN:~# cat /etc/sysctl.conf
...
net.ipv4.conf.default.forwarding=1
net.ipv4.conf.default.proxy_arp=1
net.ipv4.conf.eth0.proxy_arp = 1

net.ipv4.ip_forward=1
net.ipv4.conf.all.rp_filter = 1
kernel.sysrq = 1
net.ipv4.conf.default.send_redirects = 1
net.ipv4.conf.all.send_redirects = 0

root@gateN:~# sysctl -p

root@gateN:~# ln -s /var/lib/vz /vz

gate1:~# cd /var/lib/vz/template/cache/
gate1:~# wget http://download.openvz.org/template/precreated/contrib/ubuntu-8.04.2-i386-minimal.tar.gz
gate1:~# cd 
gate1:~# vzctl create 101 --ostemplate ubuntu-8.04.2-i386-minimal

gate1:~# vzctl set 101 --ipadd 192.168.X.30 --save
gate1:~# vzctl set 101 --hostname mail.corpX.un --save
gate1:~# vzctl set 101 --nameserver 192.168.X.254 --save

root@gate1:~# cat /etc/vz/conf/101.conf
...
IP_ADDRESS="192.168.X.30"
HOSTNAME="mail.corpX.un"
NAMESERVER="192.168.X.254"

gate1:~# vzctl start 101
gate1:~# vzctl enter 101