title: Error: "No space left on device" when trying to install bundle
body: <p>I'm using a virtual box setup (vagrant and virtualbox) recommended by TeamTreehouse.com(<a href="http://teamtreehouse.com/library/installing-a-ruby-development-environment/installing-a-ruby-development-environment/installing-the-treehouse-vm-on-windows" rel="nofollow">the setup</a>) and every time I try to start a new project or install a new gem I get the following errors:</p>
  
  <p><code>Errno::ENOSPC: No space left on device - /home/treehouse/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/execjs-2.2.1</code></p>
  
  <p>or</p>
  
  <pre><code>Errno::ENOSPC: No space left on device - /home/treehouse/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/cache/rails_serve_static_assets-0.0.2.gem
  </code></pre>
  
  <p>or when i cd into the virtual box i'll get </p>
  
  <pre><code>/home/treehouse/.rbenv/libexec/rbenv-init: line 151: cannot create temp file for here-document: No space left on
   device
  </code></pre>
  
  <p>I have a few projects now and I guess I'm using up too much space somewhere but I have no idea how the virtual box stuff works. It runs Ubuntu 12.04.3 LTS (GNU/Linux 3.8.0-41-generic i686). Here is my <code>df -h</code> log</p>
  
  <pre><code>Filesystem                      Size  Used Avail Use% Mounted on
  /dev/mapper/treehouse--vg-root  7.0G  4.8G  2.0G  72% /
  udev                            240M  4.0K  240M   1% /dev
  tmpfs                            50M  292K   50M   1% /run
  none                            5.0M     0  5.0M   0% /run/lock
  none                            248M     0  248M   0% /run/shm
  /dev/sda1                       228M  184M   32M  86% /boot
  /vagrant                        187G   97G   90G  52% /vagrant
  /home/treehouse/projects        187G   97G   90G  52% /home/treehouse/projects
  </code></pre>
  
  <p>I don't know how to get to the /dev/sda1 directory to find stuff to delete let alone know what is okay to delete. I deleted a couple of practice projects but I am still getting the same errors.</p>
  
  <p>Here is a gist of when I turn on the vm <a href="https://gist.github.com/anonymous/eab0855295011f5d2ddf" rel="nofollow">https://gist.github.com/anonymous/eab0855295011f5d2ddf</a></p>
  
  <p>This is a <code>dir</code> of .rbenv gems, it's pretty long and i'm not sure how I'm supposed to manage it without breaking things.
  <a href="https://gist.github.com/anonymous/2017be4b947b44b08ce1" rel="nofollow">https://gist.github.com/anonymous/2017be4b947b44b08ce1</a></p>
  
  <p>I could use some guidance</p>