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 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.

this is what I’m getting at the end when I try to update software

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marked as duplicate by Jorge Castro, Mik, Chris Wilson, Uri Herrera, Seth Mar 3 '13 at 4:38

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1 Answer

Open Update-Manager and click at settings. Then A window opens. In that window at 1st TAB you will find CD-ROM option. unclick it .

I am using 12.04 , that’s why I have 12.04 there but for you it will be 12.10 . uncheck it and try again. enter image description here

enter image description here

Method2: Open your terminal with CTRL+ALT+T and then type as

sudo nano /etc/apt/sources.list

In that file place # where ever you see the CD-ROM line .

for example:

enter image description here

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Ok I will help you . click at Unity Home button , it will open Unity dash and there type as update manager and then you can do what I mentioned in the above answer. –  raaz Mar 2 '13 at 14:35
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The name "Update Manager" in 12.04 has chaged to "Software Updater" in 12.10 –  FredN Mar 2 '13 at 14:40
    
@FredN Thanks you my friend. –  raaz Mar 2 '13 at 14:42
    
yeah let me know and delete these comments please . I am removing mine. –  raaz Mar 2 '13 at 14:52
    
It's working thanks man –  Arun Mar 2 '13 at 15:04
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