How to fix Ubuntu 16.04 apt-get error The repository does not have a Release file

 How to fix Ubuntu 16.04 apt-get error "The repository http://us.archive.ubuntu.com/ubuntu saucy Release does not have a Release file."

There are times when running apt-get update in Ubuntu will result in error messages such as the following:


If these errors are not fixed, apt will have problems when installing or upgrading packages.

Prerequisite: 

It is always a good idea to back up configuration files like /etc/apt/sources.list before you begin editing. You can then revert your changes if needed.

Steps to Fix the issue:

Download "source.list" and place it directly under "/etc/apt/" of Ubuntu 16.04.

wget https://raw.githubusercontent.com/4junaidmohsin/ubuntu1604-source.list/main/sources.list -O /etc/apt/sources.list

After placing source.list under /etc/apt directory, execute command apt-get update to download package information from all configured sources.

sudo apt-get update

Output will be as follows:


Now run apt-get dist-upgrade command which is addition to performing the function of upgrade, also intelligently handles changing dependencies with new versions of packages.

sudo apt-get dist-upgrade

Check version after upgrade using command:

sudo lsb_release -a

Output will be like.