when i run the command /usr/sbin/up2date -l ... i got this error msg :

Retrieving list of all available packages...
There was a fatal error communicating with the server. The message was:
host not found

i checked the /etc/hosts file and everything looks ok, reboot my server but the got the same msg icon_sad.gif ... any idea how can i fix the problem? thanks a lot for your help icon_smile.gif