Hi I am using CentOS 5.3 and after installing the OS i scrolled to the /etc/yum.repos.d directory and i could not find any repositories being present there. So i googled a bit on adding the repositories and found the link: http://www.osresources.com/index.php?action=artikel&cat=11&id=6&artlang=en then when i try to install the net-snmp package that i require to monitor my box i get the following error: [root at sc-devld-1 etc]# yum install net-snmp Loading "rhnplugin" plugin Loading "installonlyn" plugin Repository base is listed more than once in the configuration Repository contrib is listed more than once in the configuration Repository centosplus is listed more than once in the configuration Repository addons is listed more than once in the configuration Repository extras is listed more than once in the configuration This system is not registered with RHN. RHN support will be disabled. Setting up Install Process Setting up repositories not using ftp, http[s], or file for repos, skipping - 5Client is not a valid release or hasnt been released yet Error: Cannot find a valid baseurl for repo: update Please let me know what needs to be done. Thanks Jatin