When running a software update, I got a message telling me that either my network connections aren't working anymore, or that the repositories are no longer available. I already tried restarting my computer and running the software updater from the settings panel. I am running Xubuntu 13.04. Software Uupdate has worked in the past.
sudo apt-get update gives me the following output: (I had to take out the big chunk of links because I am not allowed to post more than 2 links)
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring Release.gpg
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring Release
Err cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/main 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
Err cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/multiverse 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
Err cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/restricted 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
Err cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/universe 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
Err cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/main 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
Err cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/multiverse 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
Err cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/restricted 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
Err cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/universe 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
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/main Translation-en_US
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/main Translation-en
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/multiverse Translation-en_US
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/multiverse Translation-en
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/restricted Translation-en_US
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/restricted Translation-en
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/universe Translation-en_US
Ign cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1) raring/universe Translation-en
----------------------------------------------------------------------------
Fetched 950 kB in 10s (88.0 kB/s)
W: GPG error: http://download.opensuse.org Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 977C43A8BA684223
W: Failed to fetch cdrom://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1)/dists/raring/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://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1)/dists/raring/multiverse/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://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1)/dists/raring/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://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1)/dists/raring/universe/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://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1)/dists/raring/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://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1)/dists/raring/multiverse/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://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1)/dists/raring/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://Xubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130423.1)/dists/raring/universe/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.
