Viewing Category : Virtual

Post thumbnail of Fix ntp time sync in virtual machines with kvm-clock
23 January 2012
Continue reading Fix ntp time sync in virtual machines with kvm-clock

Fix ntp time sync in virtual machines with kvm-clock

If your host system uses Time Stamp Counter and Virtual Machine guests use kvm-clock, then you should not use ntp on the guest. But what if you sync the physical host to a good Internet time source and just sync the virtualized guest to itself?

Post thumbnail of Autostart a KVM virtual machine from the console with virsh
12 January 2012
Continue reading Autostart a KVM virtual machine from the console with virsh

Autostart a KVM virtual machine from the console with virsh

virsh won’t let me query information, but I do know the vm names I wish to start and I have a simple ssh shell on the host machine. So lets give it a shot.

Post thumbnail of Install VirtualBox Guest Additions on Linux Mint
1 November 2011
Continue reading Install VirtualBox Guest Additions on Linux Mint

Install VirtualBox Guest Additions on Linux Mint

The only problem i’ve had with LXDE and Mint is that running as a guest in VirtualBox, the guest additions will not install properly. I tried mounting the additions from the host and installing them, no dice. I tried installing from the software repositories using the aptitude update manager, no dice. So it didn’t work out of the box for me, but a quick recompile did the trick. No moving around files or manipulating configurations are necessary, just recompile for the running kernel and you’re in business.

Post thumbnail of Eve Online - Internet Spaceships Soap Opera
12 October 2010
Continue reading Eve Online - Internet Spaceships Soap Opera

Eve Online - Internet Spaceships Soap Opera

If you’re looking to keep up with the soap opera in the Eve Online universe, look no further than EveNews24. As fast as alliances and coalitions are formed and destroyed, EveNews24 is there keeping score in the day-to-day fight. Battle Reports, Interviews, Videos, etc. it’s all there, but don’t miss out on the comments. Some of the best trash talking can be found here.

Post thumbnail of Thinking about switching your VPS to Linode?
21 June 2010
Continue reading Thinking about switching your VPS to Linode?

Thinking about switching your VPS to Linode?

Linode is cheaper than many of the other big names in VPS and they offer plenty of storage and bandwidth too. Monitoring their status page for a few days/weeks should give you a good idea of the kind of downtime you’ll be looking at.

Post thumbnail of 10 tips for boosting network performance
2 June 2010
Continue reading 10 tips for boosting network performance

10 tips for boosting network performance

10 tips, each summarized in a sentence or two. Speed up your WAN, Build a lab, know your apps, virtualization pitfalls, speed up backups, and more.

Post thumbnail of VirtualBox can’t operate in VMX root mode
5 May 2010
Continue reading VirtualBox can’t operate in VMX root mode

VirtualBox can’t operate in VMX root mode

VirtualBox can’t operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot. You might see this VirtualBox error when trying to start a virtual machine or create a new one.

Post thumbnail of qemu-ifup and qemu-ifdown network configuration scripts
8 April 2010
Continue reading qemu-ifup and qemu-ifdown network configuration scripts

qemu-ifup and qemu-ifdown network configuration scripts

These two scripts are called when you start a qemu or kvm virtual machine. I removed the openvpn –mktun and –rmtun commands because qemu handles it for you.

Post thumbnail of Create a network bridge for Virtual Machines
23 March 2010
Continue reading Create a network bridge for Virtual Machines

Create a network bridge for Virtual Machines

So you want to setup networking so virtual machines will have access to the outside world through your hosts network connection. To do this you’ll need to share your host’s external interface with virtual machines through a bridge. A bridge can join two network segments and be used to inspect all Ethernet frames that pass between them. Create a bridge and a tunnel interface. Assign the tunnel and your host’s Ethernet interface to the bridge. Connect the bridge to the outside world. Your host uses the network card in promiscuous mode to handle packets for other interfaces connected to the bridge.

Post thumbnail of Build and Install the Latest QEMU Machine Emulator from Source
28 January 2010
Continue reading Build and Install the Latest QEMU Machine Emulator from Source

Build and Install the Latest QEMU Machine Emulator from Source

QEMU is a generic and open source machine emulator and virtualizer. When used as a machine emulator, QEMU can run OSes and programs made for one machine architecture on a different machine architecture. This is different than VMware, VirtualBox, or Hyper-V where you’re running different operating systems on the same architecture.

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