Creating virtual networks with NetworkManager

In Linux, you can create a virtual network - aka. vlan. To create it you need to create a file under /etc/sysconfig/network-scripts/ directory. For example, if you want to create a virtual network for eth0, you need to create a file something like below. Here I created with a tag 0. $ cat /etc/sysconfig/network-scripts/ifcfg-eth0:0 DEVICE="eth0:0" … Continue reading Creating virtual networks with NetworkManager

Set up test environment with two virtual machines.

To test some problems usually I have to have two machines which is not easy to have. Especially if I have to configure it for each version, RHEL4, RHEL5, Fedora, etc. Virtualzation comes here to solve those kinds of difficulty. But, just installing new operating system each time is also not a perfect solution. You … Continue reading Set up test environment with two virtual machines.