this is obsolete doc -- see http://doc.nethence.com/ instead

Debian GNU/Linux XEN dom0 

with XEN3 hypervisor 

Packages' installation 

Install the xen micro-kernel, tools and the dom0 linux kernel, 

apt-get install \

xen-hypervisor-3.2-1-amd64 \

xen-utils-3.2-1 \

linux-image-xen-amd64 \

xen-tools

Network configuration 

Clean up the config file, 

cd /etc/xen/

mv xend-config.sxp xend-config.sxp.dist

sed '/^#/d; /^$/d' xend-config.sxp.dist | sed 's/dummy/bridge/' > xend-config.sxp

Otherwise see http://pbraun.nethence.com/doc/sysutils_xen/dom0_network.html 

Tips 

To avoid this error in the logs, 

xen_net: Memory squeeze in netback driver.

edit xen config, 

cd /etc/xen/

vi xend-config.sxp

change, 

(dom0-min-mem 96)

and grub config, 

vi /boot/grub/menu.lst

change, 

kernel          /boot/xen-3.2-1-amd64.gz dom0_mem=96M

sda vs hda 

The dom0 kernel behaves differently here, 

cd /etc/

cp fstab fstab.dist

vi /etc/fstab

:%s/sda/hda/g

Ready to go 

Reboot, 

shutdown -r now

once the host as reboote, check you're running the dom0 kernel, 

uname -r

Note. for example 2.6.26-2-xen-amd64 

References 

http://tcweb.org/wiki/Xen_dedibox_v3