Updates for wrong OS

[Colin Law]

On 12 November 2015 at 13:26, Wade Smart <wadesmart at gmail.com> wrote:
> I downloaded Ubuntu-MATE 15.10 to install on a older laptop last week.
> Yesterday on my Ubuntu 14.04 machine the updater came up and said it
> had 268mb of updates. That is quite a lot. I clicked ok and it started to
> download. Now it says I have this error:
>
> CD/DVD "Ubuntu-MATE 15.10' is required. Please insert the above cd/dvd
> into the drive.
>
> I looked at the source list and I do not see a entry for this so Im not sure
> how this is happening.

I am not sure why you say it is for the wrong OS as you say you
installed 15.10 and it is asking for that DVD, however to disable it
check in /etc/apt/sources.list.  You will probably find a line in
there starting deb cdrom: or something similar.  This should be
commented out.  Then run
sudo apt update

If you have, on Mate, a graphical app that shows the s/w sources then
you should be able to disable it there instead.

Colin

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