check_nfs / check_nfs_file

Two Nagios plugins to verify the presence and used disk space of an NFS share, and the existance of a file on that mount, without needing to mount the share from the OS.
Accessing NFS files using the OS may result in long delays, and unkillable processes, if the server is down (depending on mount options). Also, in a nagios context you may want to check dozens or hundreds of shares, making it impractical to mount them all from /etc/fstab.
Using check_nfs server sharename warn crit or check_nfs_file server directory file, the plugins directly talk to the NFS server using socket communication.