Create various virtual machines using Vagrant.
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## Step 1: First install VirtualBox dependencies.
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$ yum -y install gcc dkms make qt libgomp patch
$ yum -y install kernel-headers kernel-devel binutils glibc-headers glibc-devel font-forge
$ mkdir -p /etc/yum.repos.d/; cd /etc/yum.repos.d/
$ wget http://download.virtualbox.org/virtualbox/rpm/rhel/virtualbox.repo
$ yum install -y VirtualBox-5.1
$ /usr/lib/virtualbox/vboxdrv.sh setup # In CentOS 7
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## Step 2: Installing Vagrant on CentOS 7
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$ yum -y install https://releases.hashicorp.com/vagrant/2.0.1/vagrant_2.0.1_x86_64.rpm
# Show downloaded base vagrant box
vagrant box list