How to update ubuntu 17.04 if update-manager can't see internet?

Question

ubuntu

Can't upgrade from Ubuntu 17.04.
I go to update-manager ->
sudo apt-get update ->
Programs and updates - Other software ->

Answer 1

What do you want? Zesty is no longer supported remove it from the list of repositories
You need to upgrade to Artful and then if you want to Bionic

Answer 2

He sees everything. Check the descriptions and paths of the repositories, there may be a temporary error while the repository is being updated from the master.