What is Vagrant?
Vagrant is a free open-source software for creating complete development environments as virtual machines. With Vagrant it is made easy to create many virtual machines and setup that automatically with one command. What is more all the environment can be destroyed and created again and again as much as needed.
Installation of Vagrant is very easy. Just surf to the offical site and its download page: http://www.vagrantup.com/downloads. Download the installation packages according to your operating system. Vagrant supports Windows, Mac OS X, Linux DEB and Linux RPM. So you will have no problem finding the correct installation package for your test of OS. Install the software and the vagrant will be available in command prompt or terminal.
Before or after Vagrant installation you will need Virtualbox also installed in your computer. Download link: https://www.virtualbox.org/wiki/Downloads