Rename network interface back to old "eth0" on Fedora/RHEL/CentOS

The easiest way to restore the old way Kernel/modules/udev rename your ethernet interfaces is supplying these kernel parameters to Fedora 19:


To do so follow this steps:

  1. Edit /etc/default/grub
  2. At the end of GRUB_CMDLINE_LINUX line append "net.ifnames=0 biosdevname=0"
  3. Save the file
  4. Type "grub2-mkconfig -o /boot/grub2/grub.cfg"
  5. Type "reboot"

How to delegate a subdomain to another nameserver

In order to delegate a sub-domain's DNS management to another server, perform the following steps:

1. Set NS records for your subdomain and in DATA field put a nameserver: NS ns1.nameserver.tld NS ns2.nameserver.tld

2. Then create a new nameserver

3. Now you can start adding A records for your new subdomain, like:


Virt-manager keymap problem on OS X

virt-manager keymaps on OS X
Published on Wed, 17 Nov 2010 20:12:26 +0000 in Uncategorized. 13 Comments


Web based virtualization management applications

openQRM is the next generation, open-source Data-center management platform. Its fully pluggable architecture focuses on automatic, rapid- and appliance-based deployment, monitoring, high-availability, cloud computing and especially on supporting and conforming multiple virtualization technologies. openQRM is a single-management console for the complete IT-infra structure and provides a well defined API which can be used to integrate third-party tools as additional plugins.


How to create and clone a KVM virtual machine on Ubuntu Server

After having KVM installed in your system, you can easily create a guest virtual machine by running the following command: vmbuilder kvm ubuntu --suite lucid --flavour virtual --iso /opt/iso-images/ubuntu1004.iso --dest=/home/destination --arch amd64 --libvirt qemu:///system --hostname ubuntu --bridge br0 --ip --mask --gw --user ubuntu --name Ubuntu --pass ubuntu --rootsize 110000 --swapsize 1824 --mem 1824 --addpkg acpid --addpkg rsync --addpkg openssh-server --addpkg nano

After having your guest virtual machine up and running you might want to utilize one of the things that's very useful when using virtual machines - the ability to clone them.

How to remove/turn off/disable Linux KVM virbr0 NAT Interface

A virtual bridge, can be defined as a device that bridges virtual interfaces. It provides an easy means of networking virtual networking devices such as venet (virtual network) or veth (virtual ethernet).

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