Hit http://us.archive.ubuntu.com precise-backports/restricted Translation-en                                                                                             
Get:59 http://us.archive.ubuntu.com precise-backports/universe Translation-en [35.0 kB]                                                                                  
Fetched 5,814 kB in 17s (332 kB/s)                                                                                                                                       
W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 005EAE8119BB5BCA
W: GPG error: http://extras.ubuntu.com precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192
W: Failed to fetch cdrom://Ubuntu 12.04.5 LTS _Precise Pangolin_ - Release amd64 (20140807)/dists/precise/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 12.04.5 LTS _Precise Pangolin_ - Release amd64 (20140807)/dists/precise/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

W: Failed to fetch cdrom://Ubuntu 12.04.5 LTS _Precise Pangolin_ - Release amd64 (20140807)/dists/precise/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 12.04.5 LTS _Precise Pangolin_ - Release amd64 (20140807)/dists/precise/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

E: Some index files failed to download. They have been ignored, or old ones used instead.
root@LTSP:/#