Originally Posted by
Chanath
Ok, here's what I think.
When the next development iso is released, the stable repo is moved to the new repo, for example, when 17.10 development was announced, the 17.04 repos was moved to the new artful repo and renamed artful. At that time, the login screen etc showed 17.04, and after few months, it changed to 17.10. When we downloaded 17.10 daily, whatever the derivative, it showed it is artful-desktop-amd64.iso, and after installation the installed distro shows Ubuntu Artful Aardvark (development branch). Then when the 17.10 final is released, and you do sudo do-release-upgrade -d or use the software updater, after certain waiting time, you get rid of the "(development branch)" part of the name and get the feeling that you have the new distro is installed. But,...
But, while we were using the "development" 17.10, the updates always came from the artful repo, not from some "development" repo. Whatever changes done by the base devs or given DE devs would also come from the artful repo. So, if you could successfully change the zesty repo to artful repo at the beginning or later and keep on updating and upgrading, what you have at the end of the "development" cycle is what you'd get, if you'd download the final release. Or, even more up to date install.
Until the development cycle is on, you get that Ubuntu Artful Aardvark (development branch) in your grub menu. That's what you see if you look in /etc/lsb-release, /etc/issue, etc/issue.net, /usr/lib/os-release. In my installs, apt sees the artful repo, rather than the devel repo.
In a way, Ubuntu is a rolling distro, periodically having a temporary stop in every 9 months. The Ubuntu base packages are based on Debian Sid/Testing, only packaged somewhat differently than Debian. The DE devs have to match the changing of packages and keep that rolling all the time.
Like I said at the beginning, this is what I think and that's what I did. For some time, I don't have the devel repos, only artful repos. All 17.10 installs work without a hiccup.