Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal/InRelease Temporary failure resolving 'archive.ubuntu.com' W: Some index files failed to download. They have been ignored, or old ones used instea code example

Example: emporary failure resolving

Click to copy

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