Err:1 http://archive.ubuntu.com/ubuntu bionic InRelease Temporary failure resolving 'archive.ubuntu.com' Err:2 http://security.ubuntu.com/ubuntu bionic-security InRelease Temporary failure resolving 'security.ubuntu.com' code example
Example: emporary failure resolving
echo "nameserver 8.8.8.8" | sudo tee /etc/resolv.conf > /dev/null
#this is temporary solution