+.B -n
+By default,
+.B rpc.gssd
+treats accesses by the user with UID 0 specially, and uses
+"machine credentials" for all accesses by that user which
+require Kerberos authentication.
+With the \-n option, "machine credentials" will not be used
+for accesses by UID 0. Instead, credentials must be obtained
+manually like all other users. Use of this option means that
+"root" must manually obtain Kerberos credentials before
+attemtpting to mount an nfs filesystem requiring Kerberos
+authentication.
+.TP