Could not detect which major revision of yum is in use

If you are working with Ansible and trying to run a playbook on a remote Linux machine, you may get the following error: This is due to the absence of the sudo privilege on the remote machine, just go and add the Ansible user to the sudoer file or add it to the correct group.

Avi Network Integration With Nutanix Calm

This will be a short blog post that show how easily you can integrate Avi Network solution (Avi Vantage) with Nutanix Calm. I also provide a video demo and the source code used at the end of this post. a brief description from Avi Network website about Avi Vantage: Avi Vantage delivers multi-cloud application services […]

How Much Complexity Can You Handle With Calm?

It’s power in its simplicity, simple to use doesn’t mean it can’t handle complex automation scenario. Think of this, you use some automation tool to deploy some resources, most of the case, you deploy x number of virtual machines (hold your horses container guys, people still deploy virtual machines) , you install and configure some […]

Removing an Element from an Array

In PowerShell, you can’t remove an element from an array even if the array object have a method remove, if you try to do it anyway, it will throw a NotSupportedException. The solution is to use ArrayList. Here is the scenario: suppose that you have a list of servers and you would like check something […]

Setting Delegation on Active Directory OU

While working on one of my project about automating SQL AlwaysOn cluster installation and configuration, i come across a requirement where I needed to setup a delegation for the group that contain the Windows Failover cluster computer object, this should be then positioned on an OU so it can manage computer object and be able […]

[ Script ] How To Backup and Restore Directory Permissions on Linux Machines

There is many ways to backup and restore on Linux machines, but when you have a specific need you must use some sort of scripting, don’t rely on tools because i think this get you stuck in thinking that there no other way to do the thing you need to do. The requirement was that […]

EX436 Exam Experience: Red Hat High Availability Clustering

Well, I successfully took my Red Hat Certificate of Expertise in High Availability Clustering exam (EX436) on 10 November to renew my existing RHCE certification. Through this post I will share my preparation and exam experience. Preparation Nothing can substitute experience on the subject but to be sure to have addressed all the required exam […]

Using Filter to Disconnect all Attached cdrom

Here is a simple and effective PowerShell/PowerCLI script to extract all virtual machines that have an iso attached to their cdrom and then disconnect them. I have used a filter on the first part of the script to extract only Linux virtual machines to a text file. The second part of the script, read a […]

Password Complexity and Account Lockout

This will be a brief blog post on how to use pam module on CentOS or Red hat 6.x to enforce password complexity and account lockout, the account locking will also be enabled through ssh. You can use passwdqc (which is no longer supported on RHEL7) or cracklib pam module to enforce the password complexity, […]

How to Use Special Characters on a Virtual Machine Console

The virtual machine console won’t allow you to write some special characters using some keyboard layout. As stated by this VMware KB 2071245. On my French keyboard, I was able to bypass this limitation using this keyboard combination: Alt + Alt Gr. The affected characters can include, but are not limited to: / (slash) \ […]