title: /etc/network/interfaces: What's <eth>:<num> mean?
body: <p>In <code>/etc/network/interfaces</code>, I have a physical eth0 and a vlan eth0.10, however there is an additional eth0:0</p>
  
  <pre><code>iface eth0 inet manual
  
  iface eth0.10 inet manual
      vlan-raw-device eth0
  
  iface eth0:0 inet manual
  </code></pre>
  
  <p>What does a colon mean in interfaces file? Is it the same as a dot?</p>