How to update Debian or Ubuntu Linux containers (lxc) VM

I‘m using LXC (Linux Containers) a virtualization system running on a Ubuntu LTS. How can I update all my Ubuntu or Debian Linux based guests containers VM from host operating system?

Container is not new technology. A large number of Unix-like system already have developed powerful container based virtualization solutions such as FreeBSD jails, OpenVZ, Solaris Zones and more. The LXC is very fast efficient virtualization. An