title: Unable to install ROS Melodic on Ubuntu 20.04
body: <p>I am trying to install ROS Melodic on Ubuntu 20.04 using these commands </p>
  
  <pre><code>sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" &gt; /etc/apt/sources.list.d/ros-latest.list'
  sudo apt-key adv --keyserver 'hkp://keyserver.ubuntu.com:80' --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654
  sudo apt update
  sudo apt install ros-melodic-desktop-full
  </code></pre>
  
  <p>But I get this error </p>
  
  <pre><code>E: Unable to locate package ros-melodic-desktop-full
  </code></pre>
  
  <p>I have tried to install the different versions and Kinetic Kame but they all give me the same error.</p>