Hi Bernd,
What are your "other systems"?
Cockpit 164 was released on Mar 21, 2018 — it's over 2 years old. There
have been many, many changes to Cockpit over the past 2 years.
For Red Hat Enterprise Linux 7, you're able to enable the extras repository
to install Cockpit. (RHEL 8 does not require extras.)
Modern versions of Cockpit are available in "backports" for both Debian and
Ubuntu.
(I think everywhere else should automatically have newer versions of
Cockpit...)
As you have mentioned the latest version of Ubuntu LTS, I'm going to guess
that the other systems might be the previous version of Ubuntu LTS? If so,
backports are probably the way to go:
https://cockpit-project.org/running.html#ubuntu
https://help.ubuntu.com/community/UbuntuBackports
More information on installing Cockpit on various distributions is
available at
https://cockpit-project.org/running.html — including links to
additional documentation (within the Cockpit project website and also
offsite too).
Hopefully this helps!
Cheers,
Garrett