I had ROS Kinetic on my Ubuntu running fine. Then I messed up with some packages while I was trying to learn and ran into errors that I could not fix. So I decided to remove ROS and start over. I removed ROS using:

sudo apt-get purge ros-*
sudo apt-get autoremove

Then I followed the installation instructions on ROS website : http://wiki.ros.org/kinetic/Installation/Ubuntu

sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list'
sudo apt-key adv --keyserver 'hkp://keyserver.ubuntu.com:80' --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654
sudo apt-get update
sudo apt-get install ros-kinetic-desktop-full

I get the following errors:

Err:1 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-robot-state-publisher amd64 1.13.6-0xenial-20190608-101625-0800
  404  Not Found [IP: 64.50.233.100 80]
Err:2 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-robot amd64 1.3.2-0xenial-20190608-163431-0800
  404  Not Found [IP: 64.50.233.100 80]
Err:3 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-desktop amd64 1.3.2-0xenial-20190608-164200-0800
  404  Not Found [IP: 64.50.233.100 80]
Err:4 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-simulators amd64 1.3.2-0xenial-20190608-164145-0800
  404  Not Found [IP: 64.50.233.100 80]
Err:5 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-urdf-tutorial amd64 0.3.0-1xenial-20190608-132116-0800
  404  Not Found [IP: 64.50.233.100 80]
Err:6 http://packages.ros.org/ros/ubuntu xenial/main amd64 ros-kinetic-desktop-full amd64 1.3.2-0xenial-20190608-170201-0800
  404  Not Found [IP: 64.50.233.100 80]
E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-robot-state-publisher/ros-kinetic-robot-state-publisher_1.13.6-0xenial-20190608-101625-0800_amd64.deb  404  Not Found [IP: 64.50.233.100 80]

E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-robot/ros-kinetic-robot_1.3.2-0xenial-20190608-163431-0800_amd64.deb  404  Not Found [IP: 64.50.233.100 80]

E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-desktop/ros-kinetic-desktop_1.3.2-0xenial-20190608-164200-0800_amd64.deb  404  Not Found [IP: 64.50.233.100 80]

E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-simulators/ros-kinetic-simulators_1.3.2-0xenial-20190608-164145-0800_amd64.deb  404  Not Found [IP: 64.50.233.100 80]

E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-urdf-tutorial/ros-kinetic-urdf-tutorial_0.3.0-1xenial-20190608-132116-0800_amd64.deb  404  Not Found [IP: 64.50.233.100 80]

E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-desktop-full/ros-kinetic-desktop-full_1.3.2-0xenial-20190608-170201-0800_amd64.deb  404  Not Found [IP: 64.50.233.100 80]

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

I have not been able to resolve the issue. Any suggestions?

Thanks