November 7, 2014

Virtual Machine Cannot Start (Vmware) – ESX/ESXi – 5.0

VMware,

Problem: Virtual Machine Cannot Start (Vmware) – ESX/ESXi – 5.0 Explanation: There will be situations where the VM on a host fails to start without showing any progress when the power state is reset. This can be caused by a hung process on the host.

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November 5, 2014

Increase VMware VM performance by placing the Swap file in an alternate location – ESX/ESXi 5.0

VMware,

In this post you will see how to Increase VMware VM performance by placing the Swap file. By default, a swap file is created when a virtual machine is powered ON under a ESXi host. Swap files

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October 3, 2014

Preventing WordPress XML-RPC DDOS Attack

Content management system,

WordPress XML-RPC pingback exploits are used in a number of DDoS attacks in the recent times. WordPress is widely used by many websites that uses a content management system, any vulnerability in the WordPress could compromise the website and break down the Network integrity.

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July 4, 2014

How to Change the Pool Master in Citrix Xenserver

Cloud Infrastructure,

In Xenserver pooled environment, if the pool master node goes unresponsive due to some reason. We will not be able to access the slave nodes and its corresponding VM’s from Xencenter. At this time, if we are able to manually SSH into the pool master. We can execute the following commands

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June 10, 2014

Steps to Fix VDI Not Available Error in Citrix Xenserver

Cloud Infrastructure,

During a Reboot of a VM at some unavoidable circumstances, the Startup logs might end up with "VDI not available" error. Follow the below steps to fix this:

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May 30, 2014

How to Fix – When Xenserver Host Stuck in Maintenance Mode

Cloud Infrastructure,

In this post you will see how to fix Xenserver Host Stuck in Maintenance Mode. Whenever we restart the xapi service (using either service xapi restart, or xe-toolstack-restart) the API will work for about 30 seconds and then it will stop working and any command

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May 19, 2014

Steps to be taken when a VM goes in Read-only mode

VMware,

Whenever there is a file system inconsistency involved, the system mounts in Read-only mode to prevent damage to the system. In Xen, if you come across such a situation you can try using the

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