Hello.. I get the following error after running the command: sudo apt-get install ros-electric-desktop-full
Error is: Reading package lists... Done ( I know this is not error) Building dependency tree Reading state information... Done E: Unable to locate package ros-electric-desktop-full (the PROBLEM!!)
Plz. help me out. I don't get it how to re-index it to ROS.org server..isn't MAIN server sufficient?