Possible Duplicate:
How can I fix a 404 Error using a PPA?
For some reason every time I try to update by terminal, synaptic, and update manager I get this error message and I cannot update all the data I need.
W:Failed to fetch cdrom://Ubuntu-Netbook 10.04 _Lucid Lynx_ - Release i386 (20100429.4)/dists/lucid/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-Netbook 10.04 _Lucid Lynx_ - Release i386 (20100429.4)/dists/lucid/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 http://ppa.launchpad.net/canonical-dx-team/une/ubuntu/dists/natty/main/source/Sources 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/canonical-dx-team/une/ubuntu/dists/natty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/lorenzo-carbonell/atareao/ubuntu/dists/natty/main/source/Sources 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/lorenzo-carbonell/atareao/ubuntu/dists/natty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/meebey/ppa/ubuntu/dists/maverick/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/team-xbmc/ppa/ubuntu/dists/natty/main/source/Sources 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/team-xbmc/ppa/ubuntu/dists/natty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/ubuntu-desktop/gnome3-builds/ubuntu/dists/natty/main/source/Sources 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/ubuntu-desktop/gnome3-builds/ubuntu/dists/natty/main/binary-i386/Packages 404 Not Found
, E:Some index files failed to download. They have been ignored, or old ones used instead.
Best Answer
Using Update Manager click the "Settings" button. This will open your Software Sources windows:
If you still cannot update then change your download mirror to another server: