add vagrant installation

Author: sb2nov

SUMMARY.md

@@ -27,6 +27,7 @@
     * [RubyGems](Ruby/RubyGems.md)
 * [Node.js](Node.js/README.md)
 * [Heroku](Heroku/README.md)
+* [Vagrant](Vagrant/README.md)
 * [Latex](Latex/README.md)
 * [Apps](Apps/README.md)
     * [Octave](Apps/Octave.md)

Vagrant/README.md

@@ -0,0 +1,44 @@
+# Vagrant
+
+Create and configure lightweight, reproducible, and portable development environments. [Vagrant](http://www.vagrantup.com/) is an amazing tool for managing virtual machines via a simple to use command line interface.
+
+### Install
+
+Vagrant uses [Virtualbox](https://www.virtualbox.org/) to manage the virtual dependencies. You can directly download virtualbox and install or use homebrew for it.
+
+    $ brew cask install virtualbox
+
+Now install Vagrant either from the website or use homebrew for installing it.
+
+    $ brew cask install vagrant
+
+[Vagrant-Manager](http://vagrantmanager.com/) helps you manage all your virtual machines in one place directly from the menubar.
+
+    $ brew cask install vagrant-manager
+
+### Usage
+
+Add the Vagrant box you want to use. We'll use Ubuntu 12.04 for the following example.
+
+    $ vagrant box add precise64 http://files.vagrantup.com/precise64.box
+
+You can find more boxes at [Vagrant Cloud](https://vagrantcloud.com)
+
+Now create a test directory and cd into the test directory. Then we'll initialize the vagrant machine.
+
+    $ vagrant init precise64
+
+Now lets start the machine using the following command.
+
+    $ vagrant up
+
+You can ssh into the machine now.
+
+    $ vagrant ssh
+
+Halt the vagrant machine now.
+
+    $ vagrant halt
+
+Other useful commands are `suspend`, `destroy` etc.
+