Raafat Mohamed

Senior Linux Administrator

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in Xen
September 16, 2012

Creating a Script to Generate MAC Addresses

Red Hat Virtualization can generate a MAC address for each virtual machine at the time of creation. Since there are 12 million possible numbers on the same subnet is very small, there is a chance you could get the same MAC address. To work around this, you can also write a script to generate a […]

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in Xen
June 11, 2012

Resize Xen Loop Disk Image

Here are the steps for increasing the size of a loop filesystem : 1. Stop the virtual server that is using the loop filesystem. (xm shutdown Vps_Name) 2. Add some extra space to your loop filesystem file # dd if=/dev/zero bs=1024k count=92160 >> loop_image_file This adds 90GB to the end of a file called loop_image_file […]

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in Xen
June 9, 2012

How to boot guest machine in single mode or other run levels

First method Go to the location of configuration file as Ex. /etc/xen/auto Locate the installation file, usually the name of the Xen DomU Use the “xm create” command. (The -c will connect to the console, and xencons=xvc0 will use the Xen frame buffer for SLES 10 SP1 and higher, and SLES 9 SP4. Use xencons=tty […]

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in Xen
June 3, 2012

Accessing data on xen lvm guest image

Accessing xen guest image is very easy if the image is not lvm partitioned. But the main problem arise when the image is of lvm format and normal mount command cannot be used. Here I will show both the way. The first is when ext filesystem is used, and the second is when lvm is […]

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