Add/Remove software cannot be used in fedora 5.

After fedora 5 is installed, if the machine is not connected to the Internet, or the machine is connected to the Internet through a proxy, if you directly run Add/Remove software or software update, the error message "unable to retrieve software information" is displayed.
The reason is thatProgramAll are linked to the backup storage through the Internet,

The solution is.
1. If the machine is not connected to the Internet, first link to the network.
2. If the machine accesses the Internet through proxy, you can enter
Export http_proxy = http: // username: password @ proxyserver: Port /"
Then run
[Username] pirut
Add or delete programs,
Or run
[Username] Yum update
Upgrade the program.