Err:1 http://archive.ubuntu.com/ubuntu focal InRelease Temporary failure resolving 'archive.ubuntu.com' code example

Example 1: emporary failure resolving

echo "nameserver 8.8.8.8" | sudo tee /etc/resolv.conf > /dev/null
#this is temporary solution

Example 2: Err:5 http://archive.ubuntu.com/ubuntu focal/main amd64 libgif7 amd64 5.1.9-1 Temporary failure resolving 'archive.ubuntu.com'

Check your internet connection, your VPN or any antivirus which is creating
the conflict