https://kb.unixservertech.com/ 2026-05-05T22:33:24+00:00 https://kb.unixservertech.com/ https://kb.unixservertech.com/_media/wiki/dokuwiki.svg text/html 2026-01-17T03:23:35+00:00 Anonymous (anonymous@undisclosed.example.com) https://kb.unixservertech.com/unix/virtualization/xen/dom0?rev=1768620215&do=diff Xen DOM0 Base Install apt -y install xen-system # if you don't do this, it will boot into non-xen kernel dpkg-divert --divert /etc/grub.d/08_linux_xen --rename /etc/grub.d/20_linux_xen # now, limit DOM0 memory to 4G echo '# Xen boot parameters for all Xen boots' >> /etc/default/grub echo 'GRUB_CMDLINE_XEN="dom0_mem=4096M,max:4096M"' >> /etc/default/grub echo '# do not probe anything but the boot drive for os' >> /etc/default/grub echo 'GRUB_DISABLE_OS_PROBER=true' >> /etc/default/grub echo 'a… text/html 2020-02-19T20:39:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://kb.unixservertech.com/unix/virtualization/xen/dynamic_mount?rev=1582144754&do=diff Dynamically Mount Xen Block Devices Xen is an excellent virtualization tool, but dynamically attaching/detaching can be confusing. Most of the articles I have read require you to use fairly confusing programs that require research for each volume you want to work with. text/html 2020-02-19T20:39:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://kb.unixservertech.com/unix/virtualization/xen/networking?rev=1582144754&do=diff Xen Networking Under Debian Linux (Wheezy, Xen 4.x), Xen expects the network to be defined as bridges at the DOM0 level. Thus, a simple Xen DOM0, with one interface, should define a bridge which is then passed to the virtuals. Basic Setup Assuming the interface name is eth0, we can create a bridge (called xenbr0 by convention) as follows: text/html 2020-02-19T20:39:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://kb.unixservertech.com/unix/virtualization/xen/shutdownnonstandard?rev=1582144754&do=diff Gracefully Shut down non-standard virtuals I like Xen. A lot. For me it is the best virtualization software out there. There is one pesky thing, however; if you don't have the right tools installed, Xen can not shut down your virtual (DOMU) nicely. Instead, it ends up doing a text/html 2020-02-19T20:39:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://kb.unixservertech.com/unix/virtualization/xen/start?rev=1582144754&do=diff Xen Xen (<https://www.xenproject.org/>) is a virtualization project that allows a single physical machine to run multiple virtual servers. Each virtual server thinks it owns an entire computer (kinda, there are ways around it). The machine which holds the virtuals is commonly referred to as the text/html 2020-02-19T20:39:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://kb.unixservertech.com/unix/virtualization/xen/windows?rev=1582144754&do=diff Windows Configuration file (hvm) Windows under Xen is a problem. One thing I found with installing Windows 7 is that it can not find the default driver for the network. Following is a possible xen configuration # This configures an HVM rather than PV guest builder = "hvm" device_model_version='qemu-xen' # Guest name name = "qbserver" # 128-bit UUID for the domain as a hexadecimal number. # Use "uuidgen" to generate one if required. # The default behavior is to generate a new UUID each time…