Hi I am new to CentOS and been into Linux for about 3 months now. I first started off with fedora and also trying my hands on CentOS now. Basically i used yum to download softwares on the fedora box. I mainly require the snmp agent for my linux boxes so as to test my network management product. On some of the CentOS boxes the following command worked for me : yum install net-snmp it installed the snmp agent for me but on others i am finding it hard to install. Basically , this is what i get : [root at centos-64-xxx ~]# yum install net-snmp Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.nyi.net * updates: mirror.nyi.net * addons: centos.corenetworks.net * extras: centos.corenetworks.net ftp://mirror.nyi.net/centos/5.3/os/x86_64/repodata/repomd.xml: [Errno 4] IOError: [Errno ftp error] timed out Trying other mirror. http://centos.corenetworks.net/5.3/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://ftp.linux.ncsu.edu/pub/CentOS/5.3/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://ftp.lug.udel.edu/pub/centos/5.3/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not found Trying other mirror. http://mirror.cs.vt.edu/pub/CentOS/5.3/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://mirror.icpl.org/centos/5.3/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://mirror.newnanutilities.org/pub/centos/5.3/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://mirror.unl.edu/centos/5.3/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://mirrors.bluehost.com/centos/5.3/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. base | 1.3 kB 00:00 http://www.cyberuse.com/centos/5.3/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file Trying other mirror. Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again This is what i found in the /etc/yum.repos.d directory: [root at centos-64-xxxx ~]# cd /etc/yum.repos.d/ [root at centos-64-xxxx yum.repos.d]# ls CentOS-Base.repo CentOS-Media.repo [root at centos-64-xxxx yum.repos.d]# Can some one please help me in this regard. Thanks Jatin