1. A tool for scanning a UNIX NFS servers to see what directories it is sharing/exporting and to whom. There are two basic forms of this command: showmount victim Shows which machines are logged onto the victim NFS server. showmount -e victim Shows which directories are being exported, and which groups can log on. Entries marked as (everyone) allow anybody to log on. Key point: This command used the rpc.mountd protocol (RPC program number 100005). On most systems, these commands do not require authentication, which means that anybody can run them. The showmount command with no arguments equates the MOUNTPROG_DUMP procedure, whereas the -e option equates to the MOUNTPROG_EXPORT procedure. This protocol is extremely light-weight, only two packets in each direction are needed: one for the portmap, and one for the procedure call. Contrast: Similar capabilities exist on Windows for Microsoft's SMB protocols. The net view \\victim command on Windows will view the shares that the victim is exporting. From Hacking-Lexicon

2. show mount information for an NFS server From whatis