8.04 update files

[Karl F. Larsen]

    I have been using the GUI update software with 8.04 for some long 
time. But in recent times the GUI does not work but using sudo aptitude 
upgrade has worked just fine. It seems to work in spite of the problems. 
Below is some of sudo aptitude update that shows me the Ubuntu file 
setup is at fault. Here it is:

 W: GPG error: http://dl.google.com stable Release: The following 
signatures couldn't be verified because the public key is not available: 
NO_PUBKEY A040830F7FAC5991
W: Failed to fetch cdrom:[Ubuntu 8.04 _Hardy Heron_ - Release i386 
(20080423)]/dists/hardy/main/binary-i386/Packages.gz  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 8.04 _Hardy Heron_ - Release i386 
(20080423)]/dists/hardy/restricted/binary-i386/Packages.gz  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.

The call for a CD-ROM is very strange.


Karl