To install Xen, we simply run [sourcecode] apt-get install xen-hypervisor xen-linux-system xen-utils xenstore-utils xenwatch xen-tools [/sourcecode] Then open /etc/modules and make sure that we have the line loop max_loop=64 in it vi /etc/modules. see below: [sourcecode] [...] loop max_loop=64 [/sourcecode] Then open /etc/xen/xend-config.sxp vi /etc/xen/xend-config.sxp, uncomment/add the line (network-script 'network-bridge antispoof=yes') and comment out all other (network-script ...) lines (antispoof=yes enables the Xen firewall which prevents that a VM can use an IP address that it is not allowed to use, like, for example, your gateway IP). Also make sure that the line (vif-script vif-bridge) is enabled. example: [sourcecode] [...] (network-script 'network-bridge antispoof=yes') [...] (vif-script vif-bridge) [...] [/sourcecode] Reboot your system. Chek the kernel version with uname -r. my example: [sourcecode] root@server1:~# uname -r 2.6.32-5-xen-amd64 root@server1:~# [/sourcecode] To use the hypervisor feature we need to run in when system is loaded. just move the boot order: [sourcecode language="bash"] mv /etc/grub.d/10_linux /etc/grub.d/50_linux update-grub2 [/sourcecode] Reboot and type dm dmesg to check this feature! You should have this example messages: [sourcecode] root@server1:~# xm dmesg (XEN) Xen version 4.0.1 (Debian 4.0.1-2) (waldi@debian.org) (gcc version 4.4.5 (Debian 4.4.5-10) ) Wed Jan 12 14:04:06 UTC 2011 (XEN) Bootloader: GRUB 1.98+20100804-14 (XEN) Command line: placeholder (XEN) Video information: (XEN) VGA is text mode 80x25, font 8x16 (XEN) VBE/DDC methods: V2; EDID transfer time: 1 seconds (XEN) Disc information: (XEN) Found 1 MBR signatures (XEN) Found 1 EDD information structures (XEN) Xen-e820 RAM map: (XEN) 0000000000000000 - 000000000009f000 (usable) (XEN) 000000000009f000 - 00000000000a0000 (reserved) (XEN) 00000000000e0000 - 0000000000100000 (reserved) (XEN) 0000000000100000 - 00000000affa0000 (usable) (XEN) 00000000affa0000 - 00000000affae000 (ACPI data) (XEN) 00000000affae000 - 00000000afff0000 (ACPI NVS) (XEN) 00000000afff0000 - 00000000b0000000 (reserved) (XEN) 00000000fec00000 - 00000000fec01000 (reserved) (XEN) 00000000fee00000 - 00000000fef00000 (reserved) (XEN) 00000000ff700000 - 0000000100000000 (reserved) (XEN) 0000000100000000 - 0000000140000000 (usable) (XEN) ACPI: RSDP 000FA310, 0014 (r0 ACPIAM) (XEN) ACPI: RSDT AFFA0000, 0044 (r1 052608 RSDT1415 20080526 MSFT 97) (XEN) ACPI: FACP AFFA0200, 0084 (r1 052608 FACP1415 20080526 MSFT 97) (XEN) ACPI: DSDT AFFA0450, 960C (r1 1AAAA 1AAAA000 0 INTL 20051117) (XEN) ACPI: FACS AFFAE000, 0040 (XEN) ACPI: APIC AFFA0390, 0080 (r1 052608 APIC1415 20080526 MSFT 97) (XEN) ACPI: MCFG AFFA0410, 003C (r1 052608 OEMMCFG 20080526 MSFT 97) (XEN) ACPI: OEMB AFFAE040, 0073 (r1 052608 OEMB1415 20080526 MSFT 97) (XEN) ACPI: HPET AFFA9A60, 0038 (r1 052608 OEMHPET0 20080526 MSFT 97) (XEN) ACPI: INFO AFFAE0C0, 0124 (r1 052608 AMDINFO 20080526 MSFT 97) (XEN) ACPI: NVHD AFFAE1F0, 0284 (r1 052608 NVHDCP 20080526 MSFT 97) (XEN) ACPI: SSDT AFFA9AA0, 028A (r1 A M I POWERNOW 1 AMD 1) (XEN) System RAM: 3839MB (3931388kB) (XEN) Domain heap initialised (XEN) Processor #0 15:11 APIC version 16 (XEN) Processor #1 15:11 APIC version 16 (XEN) IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23 (XEN) Enabling APIC mode: Flat. Using 1 I/O APICs (XEN) Using scheduler: SMP Credit Scheduler (credit) (XEN) Detected 2600.088 MHz processor. (XEN) Initing memory sharing. (XEN) HVM: ASIDs enabled. (XEN) HVM: SVM enabled (XEN) AMD-Vi: IOMMU not found! (XEN) I/O virtualisation disabled (XEN) AMD: Disabling C1 Clock Ramping Node #0 (XEN) Total of 2 processors activated. (XEN) ENABLING IO-APIC IRQs (XEN) -> Using new ACK method (XEN) checking TSC synchronization across 2 CPUs: (XEN) CPU#0 had -2 usecs TSC skew, fixed it up. (XEN) CPU#1 had 2 usecs TSC skew, fixed it up. (XEN) Platform timer is 25.000MHz HPET (XEN) Allocated console ring of 16 KiB. (XEN) Brought up 2 CPUs (XEN) *** LOADING DOMAIN 0 *** (XEN) Xen kernel: 64-bit, lsb, compat32 (XEN) Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x16ba000 (XEN) PHYSICAL MEMORY ARRANGEMENT: (XEN) Dom0 alloc.: 0000000138000000->000000013c000000 (921455 pages to be allocated) (XEN) VIRTUAL MEMORY ARRANGEMENT: (XEN) Loaded kernel: ffffffff81000000->ffffffff816ba000 (XEN) Init. ramdisk: ffffffff816ba000->ffffffff8323b600 (XEN) Phys-Mach map: ffffffff8323c000->ffffffff83963b78 (XEN) Start info: ffffffff83964000->ffffffff839644b4 (XEN) Page tables: ffffffff83965000->ffffffff83986000 (XEN) Boot stack: ffffffff83986000->ffffffff83987000 (XEN) TOTAL: ffffffff80000000->ffffffff83c00000 (XEN) ENTRY ADDRESS: ffffffff81509200 (XEN) Dom0 has maximum 2 VCPUs (XEN) Scrubbing Free RAM: .done. (XEN) Xen trace buffers: disabled (XEN) Std. Loglevel: Errors and warnings (XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings) (XEN) Xen is relinquishing VGA console. (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen) (XEN) Freed 176kB init memory. (XEN) MCE: MSR 417 is not MCA MSR (XEN) MCE: MSR 417 is not MCA MSR root@server1:~# [/sourcecode] Yeeeah, Xen 4.0 is already running well on our system guys! Happy struggling...