install vagrant on ubuntu 18.04 code example

Example 1: vagrant ubuntu 16.04

vagrant init bento/ubuntu-16.04
vagrant up

Example 2: install vagrant ubuntu

sudo apt install ./vagrant_2.2.6_x86_64.deb

Example 3: install vagrant in ubuntu 18.04

curl -O https://releases.hashicorp.com/vagrant/2.2.6/vagrant_2.2.6_x86_64.deb