[Error Fix] Solved 'W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/source.list*'

# Problem

when I want to run 'sudo apt-get update', I get the following messages:

$ sudo apt-get update
Citire liste de pachete... 0%
Citire liste de pachete... Terminat
Se construiește arborele de dependență       
Se citesc informațiile de stare... Terminat
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:2 and /etc/apt/sources.list:5
W: Target Packages (main/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:2 and /etc/apt/sources.list:5
...

# Solution

main, universe, multiverse, restricted are different components of the Sections portion in a sources.list entry and can not be duplicated for a given entry (same Type (e.g. deb), URI (e.g. http://archive.ubuntu.com/ubuntu/).

In your /etc/apt/sources.list, you have duplicate components (main, restricted, universe) in lines 2 and 5:

deb http://archive.ubuntu.com/ubuntu focal main universe
deb http://archive.ubuntu.com/ubuntu focal main universe restricted multiverse

As line 5 is a superset of line 2, you can remove line 2 using your favorite editor or use sed:

$ sudo sed -i '2d' /etc/apt/sources.list

Or comment out the 2nd line:

$ sudo sed -i '2 s/^/# /' /etc/apt/sources.list

# Reference

[StackExchange] How to fix error W: Target Packages (main/binary-amd64/Packages) is configured multiple times in my sources.list file?: https://askubuntu.com/questions/760746/how-to-fix-error-w-target-packages-main-binary-amd64-packages-is-configured-m