As a continuing project I always love playing with virtulisation. This is some notes for installing and configuring KVM on Debian. Its mainly for my own reference, but if you find it useful please leave a comment!
1. Create a Debian ‘base system’ and fully update it. I use Debian stable, and a minimal install.
Hardware Requirements for KVM
KVM works best if your processor supports virtulisation extensions. It WILL still work if you dont, but dont expect any decent performance! Installations of virtual hosts are sometimes painfully slow without this!
I like my virtualmachines to get their own proper IP address from my LAN or be configured with a static. For this to work and get past the default NAT setup, you will need to setup a network bridge. Follow the link here: http://wiki.debian.org/BridgeNetworkConnections#Setting_up_your_Bridge on how to set that up.
2. Now you should have a fully patched and updated Debian system, we’re now going to install KVM:
apt-get install qemu-kvm libvirt-bin