On Linux Mint 18.3, receiving this error when attempting software
manager updates:
The repository 'https://dl.ring.cx/ring-nightly/linuxmint_18.3 ring
Release' does not have a Release file.Data from such a repository
can't be authenticated and is therefore potentially dangerous to
use.See apt-secure(8) manpage for repository creation and user
configuration details.Failed to fetch
https://dl.ring.cx/ring-nightly/linuxmint_18.3/dists/ring/main/binary-i386/Packages
404 Not FoundSome index files failed to download. They have been
ignored, or old ones used instead.
I had received this error after attempting the automatic update of
Ring, through software manager. I noticed only the daemon had been
installed; not the Gnome client (that had been removed).
Uninstalled Ring completely and removed the repository. Reinstalled
(My previous post makes reference to this, as there was a little
problem with the package name.)
All seemed well until Linux Mint tried to refresh the update
manager. Same error message is occurring again.
I am somewhat new to Linux, so please be clear (and kind) :-)
Arlen