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I get the following message trying to update Ubuntu ;

Failed to download repository information details W:Failed to fetch cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5)/dists/quantal/main/binary-amd64/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, W:Failed to fetch cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5)/dists/quantal/restricted/binary-amd64/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, W:Failed to fetch cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5)/dists/quantal/main/binary-i386/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, W:Failed to fetch cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5)/dists/quantal/restricted/binary-i386/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, E:Some index files failed to download. They have been ignored, or old ones used instead.
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possible duplicate of Update Manager Not working due to missing CD-ROM –  Uri Herrera Jan 15 '13 at 4:19
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1 Answer 1

looks like your system is trying to grab packages off the DVD disks. you will need to update your /etc/apt/sources.list

your can generate a list for 12.10 here http://repogen.simplylinux.ch/

if your confused by all this give this a try open a text editor and edit this file /etc/apt/sources.list comment out all the cdrom lines or remove them

add the following lines to the file and save it

deb http://us.archive.ubuntu.com/ubuntu/ quantal main restricted universe multiverse

deb http://us.archive.ubuntu.com/ubuntu/ quantal-security main restricted universe multiverse

deb http://us.archive.ubuntu.com/ubuntu/ quantal-updates main restricted universe multiverse

deb http://us.archive.ubuntu.com/ubuntu/ quantal-proposed main restricted universe multiverse

deb http://us.archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse

after you have entered this run sudo apt-get update

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I followed your advice and did everything I think. It still doesn't work. I'am wondering if I did something wrong or other. –  Michael Scott Jan 15 '13 at 4:38
    
are you still getting the same errors? can you post a the contains of your /etc/apt/sources.list file? –  max Jan 16 '13 at 0:18
    
I decided to go back 12.04. couldn't fix the problem myself. Thanks for your help. –  Michael Scott Jan 16 '13 at 22:48
    
Michael can you post your sources.list from /etc/apt/ ?? –  indyaah May 8 '13 at 16:53
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