sudo apt-get install virtualbox
sudo apt-get install vagrant
Source: https://www.ruby-lang.org/en/downloads/
cd ~/downloads
wget -v http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.1.tar.gz
mkdir ~/applications
mv ~/downloads/ruby-2.1.1.tar.gz ~/applications
cd ~/applications
tar -zxvf ruby-2.1.1.tar.gz
cd ruby-2.1.1
./configure
make
sudo make install
vagrant -v
ruby -v
virtualbox