Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
List all active guest domains in Xen
Answer:
To list all active guest domains in Xen, you can use the xm list command.
# xm list
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 768 2 r----- 1029.3
Web-server 12 256 1 -b---- 13.7Convert Xen IMG based VM to Virtual Box
Answer:
In order to convert a VM image (file based) running in Xen and to use in the Virtual Box, you can use the following tricks.
# VBoxManage convertfromraw -format VDI filename.img filename.vdi
That is it.
SIOCSIFADDR: No such device after cloning VM
Answer:
When you cloned a VM from another machine, or migrated from another VM solution such as Xen, when you start the networking, you might encounter the problem of "SIOCSIFADDR: No such device eth0".
This is because the MAC address of your VM has changed!
To solve it, just enter the command below:
# sudo rm /etc/udev/rules.d/70-persistent-net.rules
Restart your VM and should be okay now.
Cannot start VirtualBox when installed KVM
Answer:
When you have installed the KVM module, it will conflict with your VirtualBox. To solve it in order to use the VirtualBox, execute the following command below:
1. For Intel CPU
# sudo rmmod kvm-intel
2. For AMD CPU
# sudo rmmod kvm-amd
Then you can start VirtualBox instance normally.
Making ntp works in Xen domU
Answer:
In Xen, the clocks of all VMs are controlled by dom0, in order to make ntp work independently, you can edit the file "/etc/sysctl.conf"
xen.independent_wallclock = 1
Restart your server to take effects.
