Err:9 http://archive.ubuntu.com/ubuntu eoan-backports Release 404 code example
Example: not found 91.189.88.142 ubuntu
deb http://archive.ubuntu.com/ubuntu bionic main universe multiverse restricted
deb http://security.ubuntu.com/ubuntu/ bionic-security main multiverse universe restricted
deb http://archive.ubuntu.com/ubuntu bionic-updates main multiverse universe restricted