On 19-06-17, Alan Reding wrote:
> I downloaded the first DVD of Debian Stretch and installed the OS onto my
> After I typed
> sudo apt-get update
> The following error message appeared:
> W: The repository "cdrom://[Debian GNU/Linux 9.0.0 _Stretch_ - Official amd64
> DVD Binary-1 20170617-13:08] Stretch Release" does not have a Release file.
> N: Data from such a repository can't be authenticated and is therefore
> potentially dangerous to use.
> N: See apt-secure(8) manpage for repository creation and user configuration
> I have been using Debian since Wheezy (7.0) and this is the first time I have
> received such a warning.
> Should I inform the Debian Release team? Is it aware of the omission of the
> Release file?
It is actually quite normal thing and all you need to do is to comment
out/delete lines in your sources.list for cdrom.