Failed update for ubuntu 12.04 LTS

[Nils Kassube]

ralph wrote:
> I am getting the following error message during an update to my ubuntu
> 12.04 LTS system.  I'm not running under KDE -- however I did
> download the kubuntu 13.04 iso to load onto another computer.  Why is
> the update looking for the kubuntu install disk.
> 
> error message follows:
> 
>    ":CD/DVD 'Kubuntu 13.04 _Raring Ringtail_ - Release i386
> (20130424)' is required
> 
>       Please insert the above CD/DVD into the drive '/media/cdrom/' to
> install software packages from it."

That's a bit strange IMHO. Anyway, I suppose there is an entry for the 
CD in the file "/etc/apt/sources.list" for the CD image. Open the file 
as root with the command

gksudo gedit /etc/apt/sources.list

in a terminal and either remove the offending line or make it a comment 
by putting a "#" character at the beginning of the line. Then save the 
file and try the update again.


Nils