Thank you. But what I still met problems.
I have tried to add
http://apt.unl.edu/ to it. It telled me that
http://apt.unl.edu/ could not be connected. What's wrong?
I did these:
rpm
http://apt.unl.edu/ redhat/9/i386 os updates freshrpms
When I do apt-get update it shows:
Err
http://apt.unl.edu redhat/9/i386/os pkglist
404 Not Found
Ign
http://apt.unl.edu redhat/9/i386/os release
Hit
http://ayo.freshrpms.net redhat/9/i386/os pkglist
Hit
http://ayo.freshrpms.net redhat/9/i386/os release
Hit
http://ayo.freshrpms.net redhat/9/i386/updates pkglist
Hit
http://ayo.freshrpms.net redhat/9/i386/updates release
Hit
http://ayo.freshrpms.net redhat/9/i386/freshrpms pkglist
Hit
http://ayo.freshrpms.net redhat/9/i386/freshrpms release
Err
http://apt.unl.edu redhat/9/i386/updates pkglist
404 Not Found
Ign
http://apt.unl.edu redhat/9/i386/updates release
Err
http://apt.unl.edu redhat/9/i386/freshrpms pkglist
404 Not Found
Ign
http://apt.unl.edu redhat/9/i386/freshrpms release
Failed to fetch
http://apt.unl.edu/redhat/9/i386/base/pkglist.os 404 Not Found
Failed to fetch
http://apt.unl.edu/redhat/9/i386/base/pkglist.updates 404 Not Found
Failed to fetch
http://apt.unl.edu/redhat/9/i386/base/pkglist.freshrpms 404 Not Found
Reading Package Lists... Done
Building Dependency Tree... Done
E: Some index files failed to download, they have been ignored, or old ones used instead.