I was following instructions in the wiki here http://wiki.centos.org/HowTos/CreateLocalMirror to create a local mirror for testing VMs instead of hitting the public mirrors. However, I could not mount the NFS share in the guest. Error logged on the host was: request to export an unmounted filesystem: /share After some googling, I found this discussion http://www.ibm.com/developerworks/forums/thread.jspa?threadID=311075 which indicates that the problem is with this part in the wiki: cat >> /etc/exports /share 192.168.1.0/24(rw,mountpoint) The option "mountpoint" should not be specified for a directory. I was able to mount the NFS share after removing it. Could somebody else verify and update the wiki if confirmed?