Failed to fetch cdrom://Ubuntu 14.04 LTS _Trusty Tahr_ - Release amd64 (20140417)/dists/trusty/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 14.04 LTS _Trusty Tahr_ - Release amd64 (20140417)/dists/trusty/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 http://archive.ubuntu.com/ubuntu/dists/trusty/Release.gpg Connection failed
E: Some index files failed to download. They have been ignored, or old ones used instead.
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muru
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Shravan kumar
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Go to software center, edit menu, sources and in the very first tab disable the CD/DVD every.

xangua
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