Building a "Quick" Lab Environment with Linux Containers

This blog post explains how to build efficient, portable test environments using LXC (Linux Containers), Btrfs (copy-on-write filesystem), and kvm. It covers host preparation, network design with veth and Linux bridges, creating and configuring containers (including an example router), fstab bind mounts, starting and managing containers, and using Btrfs snapshots to cheaply clone templates for rapid deployment.