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28 .\" @(#)mountd.8 8.4 (Berkeley) 4/28/95
44 .Op Ar exportsfile ...
48 utility is the server for
50 mount requests from other client machines.
51 It listens for service requests at the port indicated in the
53 server specification; see
54 .%T "Network File System Protocol Specification" ,
55 RFC1094, Appendix A and
56 .%T "NFS: Network File System Version 3 Protocol Specification" ,
59 The following options are available:
60 .Bl -tag -width indent
62 Allow the administrator to force clients to use only the
65 protocol to mount file systems from this server.
67 Output debugging information.
69 will not detach from the controlling terminal and will print
70 debugging messages to stderr.
72 Ignored; included for backward compatibility.
74 Specify specific IP addresses to bind to for TCP and UDP requests.
75 This option may be specified multiple times.
82 Note that when specifying IP addresses with
85 will automatically add
87 and if IPv6 is enabled,
93 requests to be logged.
95 Allow non-root mount requests to be served.
96 This should only be specified if there are clients such as PC's,
98 It will automatically clear the vfs.nfsd.nfs_privport sysctl flag, which
99 controls if the kernel will accept NFS requests from reserved ports only.
103 to bind to the specified port, for both
108 This is typically done to ensure that the port which
110 binds to is a known quantity which can be used in firewall rulesets.
113 cannot bind to this port, an appropriate error will be recorded in
114 the system log, and the daemon will then exit.
116 Do not support the Mount protocol and do not register with
118 This can be done for NFSv4 only servers, since the Mount protocol is not
120 Useful for NFSv4 only servers that do not wish to run
123 will not work, however since NFSv4 mounts are not shown by
125 this should not be an issue for an NFSv4 only server.
127 Allow mount RPCs requests for regular files to be served.
128 Although this seems to violate the mount protocol specification,
129 some diskless workstations do mount requests for
130 their swapfiles and expect them to be regular files.
131 Since a regular file cannot be specified in
133 the entire file system in which the swapfiles resides
134 will have to be exported with the
138 Specify an alternate location
139 for the exports file.
140 More than one exports file can be specified.
142 Tell mountd to suspend/resume execution of the nfsd threads whenever
143 the exports list is being reloaded.
144 This avoids intermittent access
145 errors for clients that do NFS RPCs while the exports are being
146 reloaded, but introduces a delay in RPC response while the reload
150 crashes while an exports load is in progress,
152 must be restarted to get the nfsd threads running again, if this
159 it loads the export host addresses and options into the kernel
163 After changing the exports file,
164 a hangup signal should be sent to the
167 to get it to reload the export information.
168 After sending the SIGHUP
169 (kill \-s HUP `cat /var/run/mountd.pid`),
170 check the syslog output to see if
173 errors in the exports file.
177 detects that the running kernel does not include
179 support, it will attempt to load a loadable kernel module containing
189 .Bl -tag -width /var/run/mountd.pid -compact
191 the list of exported file systems
192 .It Pa /var/run/mountd.pid
193 the pid of the currently running mountd
194 .It Pa /var/db/mountdtab
195 the current list of remote mounted file systems
208 utility first appeared in