Thanks @schoen! Well, closed the question…
Need for Issues:
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Posting here certbot/issues/4341, the need for better layout of the notice in the guide.
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Seeing here issue of year 2015 the need for PPA (!), the “no-
aptand no-PPA” is a bug that never fixed.
PS: how to interact and to influence the UBUNTU community? At this moment, after lost all efforts, is a moment to do some lobby or a big noise for UBUNTU administrators.