/usr/bin/nsd-control

/usr/bin/nsd-control: invalid option -- '-'
Usage:	nsd-control [options] command
	Remote control utility for nsd server.
Version 4.15.4. Report bugs to <https://github.com/NLnetLabs/nsd/issues or nsd-bugs@nlnetlabs.nl>.
Options:
  -c file	config file, default is /etc/nsd/nsd.conf
  -s ip[@port]	server address, if omitted config is used.
  -h		show this usage help.
Commands:
  start				start server; runs nsd(8)
  stop				stops the server
  reload [<zone>]		reload modified zonefiles from disk
  reconfig			reload the config file
  repattern			the same as reconfig
  log_reopen			reopen logfile (for log rotate)
  status			display status of server
  stats				print statistics
  stats_noreset			peek at statistics
  addzone <name> <pattern>	add a new zone
  delzone <name>		remove a zone
  changezone <name> <pattern>	change zone to use pattern
  addzones			add zone list on stdin {name space pattern newline}
  delzones			remove zone list on stdin {name newline}
  write [<zone>]		write changed zonefiles to disk
  notify [<zone>]		send NOTIFY messages to secondary servers
  transfer [<zone>]		try to update secondary zones to newer serial
  force_transfer [<zone>]	update secondary zones with AXFR, no serial check
  zonestatus [<zone>]		print state, serial, activity
  serverpid			get pid of server process
  verbosity <number>		change logging detail
  print_tsig [<key_name>]	print tsig with <name> the secret and algo
  update_tsig <name> <secret>	change existing tsig with <name> to a new <secret>
  add_tsig <name> <secret> [algo] add new key with the given parameters
  assoc_tsig <zone> <key_name>	associate <zone> with given tsig <key_name> name
  del_tsig <key_name>		delete tsig <key_name> from configuration
  add_cookie_secret <secret>	add (or replace) a new cookie secret <secret>
  drop_cookie_secret		drop a staging cookie secret
  activate_cookie_secret	make a staging cookie secret active
  print_cookie_secrets		show all cookie secrets with their status