Ubuntu – Failed to download repository information due to missing CDROM


When updating I got this error message:

W:Failed to fetch cdrom://Ubuntu 11.10 _Oneiric Ocelot_ - Release amd64 (20111012)/dists/oneiric/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 http://ppa.launchpad.net/synce/ubuntu/dists/your_ubuntu_version/main/source/Sources  404  Not Found

What to do?

Best Answer

Run "Software & Updates" and uncheck checkbox near "Cdrom with Ubuntu" enter image description here

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