What are "Failed to fetch cdrom" errors in Update Manager and how do I fix them? [closed]

Posted by gcc on Ask Ubuntu See other posts from Ask Ubuntu or by gcc
Published on 2012-06-02T09:14:21Z Indexed on 2012/06/02 10:51 UTC
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Filed under:

10.04

|

apt

|

update-manager

Possible Duplicate:
Failed to download repository information due to missing CDROM

Whenever I run update-manager, I am getting the following error:

Failed to fetch cdrom://Ubuntu 10.04.2 LTS _Lucid Lynx_ - Release amd64 (20110211.1)/dists/lucid/main/binary-amd64/Packages.gz  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Failed to fetch cdrom://Ubuntu 10.04.2 LTS _Lucid Lynx_ - Release amd64 (20110211.1)/dists/lucid/restricted/binary-amd64/Packages.gz  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Failed to fetch http://ppa.launchpad.net/qwibber-daily/ppa/ubuntu/dists/lucid/main/binary-amd64/Packages.gz  404  Not Found

How can I get rid of these errors?
What is this error trying to tell me?

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