Redhat
developed a bootloader named pygrub that works in a similar way to grub, and
allows domU users to pick their own kernel using the same user interface as grub.
Xen starts pygrub before the domUs start. The console user can select the kernel to
boot from a menu that reads from the same configuration file as grub??”/grub/menu.
lst. Once the user selects a kernel and initrd, control is returned back to Xen and it
starts the selected domU kernel. In this chapter we are using the plain Xen way of
specifying the kernel and initrd in the configuration file, but you need to be aware of
the pygrub option as it can come in handy in several Xen environments.
Ubuntu Feisty
Ubuntu is a community developed Linux based on Debian that has become probably
one of the most popular Linux distributions in the world (http://www.ubuntu.com/).
It has a huge user base that is growing very rapidly and it releases new versions every
six months. We are going to use the beta version of Ubuntu Feisty and create a virtual
machine or guest domain that runs it.
Chapter 3
[ 33 ]
Time for Action??”Bootstrapping an Ubuntu
System
1. Ubuntu uses the Debian tool called debootstrap for creating a system from
scratch. This is not currently available in the Fedora repositories. There
are some much older rpms available on the net. We will download the
latest version of debootstrap from Ubuntu Feisty and install it on our Fedora
Core base system. As this is in a deb format, we will convert it into a
format suitable for installation on a Fedora system.
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