how to install ROS on Ubuntu 18.04?
i am using Ubuntu on virtual box 6. following the procedures that are available there in wiki.ros.org.
using this command sudo apt install ros-melodic-desktop-full
it shows the message
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package ros-melodic-desktop-full
Did you get Ok message when you install the key via curl?
Also make sure to update prior install. Do you have at least 20GB for the install?
Can't you install by following this procedure?