nfs-utils

root@kali:~# mount.nfs -h
usage: mount.nfs remotetarget dir [-rvVwfnsh] [-o nfsoptions]
options:
	-r		Mount file system readonly
	-v		Verbose
	-V		Print version
	-w		Mount file system read-write
	-f		Fake mount, do not actually mount
	-n		Do not update /etc/mtab
	-s		Tolerate sloppy mount options rather than fail
	-h		Print this help
	nfsoptions	Refer to mount.nfs(8) or nfs(5)

root@kali:~# mount.nfs4 -h
usage: mount.nfs4 remotetarget dir [-rvVwfnsh] [-o nfsoptions]
options:
	-r		Mount file system readonly
	-v		Verbose
	-V		Print version
	-w		Mount file system read-write
	-f		Fake mount, do not actually mount
	-n		Do not update /etc/mtab
	-s		Tolerate sloppy mount options rather than fail
	-h		Print this help
	nfsoptions	Refer to mount.nfs(8) or nfs(5)

root@kali:~# mountstats -h
usage: mountstats [-h] {mountstats,nfsstat,iostat} ...

positional arguments:
  {mountstats,nfsstat,iostat}
                        sub-command help
    mountstats          Display a combination of per-op RPC statistics, NFS
                        event counts, and NFS byte counts. This is the default
                        sub-command if no sub-command is given.
    nfsstat             Display nfsstat-like statistics.
    iostat              Display iostat-like statistics.

options:
  -h, --help            show this help message and exit

For specific sub-command help, run 'mountstats SUB-COMMAND -h|--help'

root@kali:~# nfsconf -h
nfsconf: invalid option -- 'h'
Usage: nfsconf [-v] [--file filename.conf] ...
Options:
 -v			Increase Verbosity
 --file filename.conf	Load this config file
     (Default config file: /etc/nfs.conf
 --modified "info"	Use "info" in file modified header
Modes:
  --dump [outputfile]
      Outputs the configuration to the named file
  --get [--arg subsection] {section} {tag}
      Output one specific config value
  --entry [--arg subsection] {section} {tag}
      Output the uninterpreted config entry
  --isset [--arg subsection] {section} {tag}
      Return code indicates if config value is present
  --set [--arg subsection] {section} {tag} {value}
      Set and Write a config value
  --unset [--arg subsection] {section} {tag}
      Remove an existing config value

root@kali:~# nfsidmap -h
nfsidmap: Usage: nfsidmap [-vh] [-c || [-u|-g|-r key] || -d || -l || [-t timeout] key desc]

root@kali:~# nfsiostat -h
Usage: nfsiostat [ <interval> [ <count> ] ] [ <options> ] [ <mount point> ]

 Sample iostat-like program to display NFS client per-mount' statistics.  The
<interval> parameter specifies the amount of time in seconds between each
report.  The first report contains statistics for the time since each file
system was mounted.  Each subsequent report contains statistics collected
during the interval since the previous report.  If the <count> parameter is
specified, the value of <count> determines the number of reports generated at
<interval> seconds apart.  If the interval parameter is specified without the
<count> parameter, the command generates reports continuously. If one or more
<mount point> names are specified, statistics for only these mount points will
be displayed.  Otherwise, all NFS mount points on the client are listed.

Options:
  --version             show program's version number and exit
  -h, --help            show this help message and exit

  Statistics Options:
    File I/O is displayed unless one of the following is specified:

    -a, --attr          displays statistics related to the attribute cache
    -d, --dir           displays statistics related to directory operations
    -p, --page          displays statistics related to the page cache

  Display Options:
    Options affecting display format:

    -s, --sort          Sort NFS mount points by ops/second
    -l LIST, --list=LIST
                        only print stats for first LIST mount points

root@kali:~# nfsstat --help
Usage: nfsstat [OPTION]...

  -m, --mounts		Show statistics on mounted NFS filesystems
  -c, --client		Show NFS client statistics
  -s, --server		Show NFS server statistics
  -2			Show NFS version 2 statistics
  -3			Show NFS version 3 statistics
  -4			Show NFS version 4 statistics
  -o [facility]		Show statistics on particular facilities.
     nfs		NFS protocol information
     rpc		General RPC information
     net		Network layer statistics
     fh			Usage information on the server's file handle cache
     io			Usage information on the server's io statistics
     ra			Usage information on the server's read ahead cache
     rc			Usage information on the server's request reply cache
     all		Select all of the above
  -v, --verbose, --all	Same as '-o all'
  -r, --rpc		Show RPC statistics
  -n, --nfs		Show NFS statistics
  -Z[#], --sleep[=#]	Collects stats until interrupted.
			    Cumulative stats are then printed
          		    If # is provided, stats will be output every
			    # seconds.
  -S, --since file	Shows difference between current stats and those in 'file'
  -l, --list		Prints stats in list format
  --version		Show program version
  --help		What you just did

root@kali:~# rpc.gssd -h
rpc.gssd: invalid option -- 'h'
usage: rpc.gssd [-f] [-l] [-M] [-n] [-v] [-r] [-p pipefsdir] [-k keytab] [-d ccachedir] [-t timeout] [-R preferred realm] [-D] [-H] [-U upcall timeout] [-C]

root@kali:~# rpc.idmapd -h
Usage: rpc.idmapd [-hfvCS] [-p path] [-c path]

root@kali:~# rpc.statd -h
usage: rpc.statd [options]
      -h, -?, --help       Print this help screen.
      -F, --foreground     Foreground (no-daemon mode)
      -d, --no-syslog      Verbose logging to stderr.  Foreground mode only.
      -p, --port           Port to listen on
      -o, --outgoing-port  Port for outgoing connections
      -V, -v, --version    Display version information and exit.
      -n, --name           Specify a local hostname.
      -P                   State directory path.
      -N                   Run in notify only mode.
      -L, --no-notify      Do not perform any notification.
      -H                   Specify a high-availability callout program.

root@kali:~# rpc.svcgssd -h
rpc.svcgssd: invalid option -- 'h'
usage: rpc.svcgssd [-n] [-f] [-v] [-r] [-i] [-p principal]

root@kali:~# rpcctl -h
usage: rpcctl [-h] {client,switch,xprt} ...

options:
  -h, --help            show this help message and exit

commands:
  {client,switch,xprt}
    client              Commands for rpc clients
    switch              Commands for xprt switches
    xprt                Commands for individual xprts

root@kali:~# rpcdebug -h
usage: rpcdebug [-v] [-h] [-m module] [-s flags...|-c flags...]
       set or cancel debug flags.
       (use rpcdebug -vh to get a list of modules and valid flags)

root@kali:~# showmount -h
Usage: showmount [-adehv]
       [--all] [--directories] [--exports]
       [--no-headers] [--help] [--version] [host]

root@kali:~# sm-notify -h
sm-notify: invalid option -- 'h'
Usage: sm-notify -notify [-dfq] [-m max-retry-minutes] [-p srcport]
            [-P /path/to/state/directory] [-v my_host_name]

root@kali:~# umount.nfs -h
usage: umount.nfs dir [-fvnrlh]
options:
	-f	force unmount
	-v	verbose
	-n	Do not update /etc/mtab
	-r	remount
	-l	lazy unmount
	-h	print this help

root@kali:~# umount.nfs4 -h
usage: umount.nfs4 dir [-fvnrlh]
options:
	-f	force unmount
	-v	verbose
	-n	Do not update /etc/mtab
	-r	remount
	-l	lazy unmount
	-h	print this help

root@kali:~# exportfs -h
usage: exportfs [-adfhioruvs] [host:/path]

root@kali:~# nfsdcld -h
nfsdcld [ -hFd ] [ -p pipefsdir ] [ -s storagedir ]

root@kali:~# nfsdclddb -h
usage: nfsdclddb [-h] [-p PATH] {fix-table-names,downgrade-schema,print} ...

positional arguments:
  {fix-table-names,downgrade-schema,print}
                        sub-command help
    fix-table-names     fix invalid table names
    downgrade-schema    downgrade database schema
    print               print database info

options:
  -h, --help            show this help message and exit
  -p, --path PATH       path to the database (default:
                        /var/lib/nfs/nfsdcld/main.sqlite)

root@kali:~# nfsdclnts -h
usage: nfsdclnts [-h] [-t type] [--clientinfo] [--hostname] [-v] [-f  [ ...]]
                 [-q]

Parse the nfsd states and clientinfo files.

options:
  -h, --help          show this help message and exit
  -t, --type type     Input the type that you want to be printed: open, lock,
                      deleg, layout, all
  --clientinfo        output clients information, --hostname is implied.
  --hostname          print hostname of client instead of its ip address.
                      Longer hostnames are truncated.
  -v, --verbose       Verbose operation, show debug messages.
  -f, --file  [ ...]  pass client states file, provided that info file resides
                      in the same directory.
  -q, --quiet         don't print the header information

root@kali:~# nfsdctl -h
Usage:
nfsdctl [-hdsV] [COMMAND] [ARGS]
  options:
    -h | --help          usage info
    -d | --debug         enable debugging
    -s | --syslog        log messages to syslog
    -V | --version       print version info
  commands:
    pool-mode            get/set host pool mode setting
    listener             get/set listener info
    version              get/set supported NFS versions
    threads              get/set nfsd thread settings
    nlm                  get current nlm settings
    status               get current RPC processing info
    autostart            start server with settings from /etc/nfs.conf

root@kali:~# nfsref -h
nfsref: invalid option -- 'h'
Usage: nfsref [ -t type ] SUBCOMMAND [ ARGUMENTS ]

SUBCOMMAND is one of:
	add        Add a new junction
	remove     Remove an existing junction
	lookup     Enumerate a junction

Use "nfsref SUBCOMMAND -?" for details.

root@kali:~# rpc.mountd -h
Usage: rpc.mountd [-F|--foreground] [-h|--help] [-v|--version] [-d kind|--debug kind]
	[-l|--log-auth] [-i|--cache-use-ipaddr] [-T|--ttl ttl]
	[-o num|--descriptors num]
	[-p|--port port] [-V version|--nfs-version version]
	[-N version|--no-nfs-version version] [-n|--no-tcp]
	[-H prog |--ha-callout prog] [-r |--reverse-lookup]
	[-s|--state-directory-path path] [-g|--manage-gids]
	[-t num|--num-threads=num] [-u|--no-udp]
	[-L|--no-netlink]

root@kali:~# rpc.nfsd -h
Usage:
rpc.nfsd [-d|--debug] [-H hostname] [-p|-P|--port port]
   [-N|--no-nfs-version version] [-V|--nfs-version version]
   [-s|--syslog] [-t|--tcp] [-T|--no-tcp] [-u|--udp] [-U|--no-udp]
   [-r|--rdma=] [-G|--grace-time secs] [-L|--leasetime secs] nrservs