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Virtualization with Xen

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Xen is a the No. one choice for Virtualization in Open Source world.

some basic folders



some useful commands

xm create -c /path/to/config - Start a virtual machine.
xm shutdown  - Stop a virtual machine.
xm destroy  - Stop a virtual machine immediately without shutting it down. 
It's as if you switch off the power button. xm list - List all running systems. xm console - Log in on a virtual machine.
Ctrl-] or Ctrl-5 to leave the guest console xm help - List of all commands.

Network bridge, we could create a new bridge based on eth0 or some other interface.  Here is a reference:

$ /usr/sbin/brctl addbr xenbr0
$ /sbin/ip link set xenbr0 up
# Think first before using addif, it may hang up the eth0
$ /usr/sbin/brctl addif xenbr0 eth0

Xen networking is a very complex topic, here is a wiki page about it from


Here are some interesting talking about KVM, VirtualBox, and VMWare:

Xen in multi-processor machine

This section is trying to answer the question about how to allocate processors to different xen guest vms.

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