How to Fix Openstack Nova error “NoValidHost: No valid host was found.There are not...

I was trying to Deploy Openstack for testing inside VirtualBox and i got an error "NoValidHost: No valid host was found.There are not enough hosts available." while trying to run an...

How to install latest VirtualBox and Extension Pack in Arch Linux

This is a guide on How to install latest VirtualBox,VirtualBox Guest Additions and  Extension Pack on Arch Linux.Arch Linux is one of the most customizable, if not the best customizable Linux...

How to convert VirtualBox Disk Image (VDI) and img to Qcow2 format

This simple guide will show you the easiest way to convert VDI disk image to use on your Openstack Cloud environment. It's easy to use and you just have to isntall...

How to fix Vagrant ssh authentication failure after packaging vagrant box

Sometimes when you package VirtualBox VM to get vagrant box, you get message "Warning: Authentication failure. Retrying... " while trying to start vagrant machine. Check Step by step guide on using existing...

How to enable and use SSH X11 Forwarding on Vagrant Instances

This guide will teach you how to configure X11 forwarding to use on Virtual Machine instances managed by Vagrant.This is a series Tutorial on building Virtual Labs with Vagrant and VirtualBox. We...
working with qemu-img

Working with qemu-img in Linux

Working with qemu-img in Linux: This is a brief qemu-img cheatsheet for working with qemu-img command on Linux and Unix systems supporting qemu. I made this qemu-img cheatsheet for my own...