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I am trying to load updates from Ubuntu for 12.04 and am getting the following message that blocks the up dating.

CD/DVD 'Ubuntu 13.04 Raring Ringtail - Release amd64 (20130424)' is required

Please insert the above CD/DVD into the drive '/media/cdrom/' to install software packages from it.

I am a total novice so please do not short cut how to fix problem.

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Here is the solution found I in a previous post answered by KK Patel.

You need to edit source file

sudo gedit /etc/apt/sources.list

Please place comment # in beginning of line containing deb cdrom (with 13.04 in the line).

Save file and try again.

It worked for me. I don't know what caused this issue. If anyone knows I would like to hear


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