Usage: /usr/bin/chronyd [OPTION]... [DIRECTIVE]...

Options:
  -4		Use IPv4 addresses only
  -6		Use IPv6 addresses only
  -f FILE	Specify configuration file (/etc/chrony/chrony.conf)
  -n		Don't run as daemon
  -d		Don't run as daemon and log to stderr
  -l FILE	Log to file
  -L LEVEL	Set logging threshold (0)
  -p		Print configuration and exit
  -q		Set clock and exit
  -Q		Log offset and exit
  -r		Reload dump files
  -R		Adapt configuration for restart
  -s		Set clock from RTC
  -t SECONDS	Exit after elapsed time
  -u USER	Specify user (chrony)
  -U		Don't check for root
  -F LEVEL	Set system call filter level (0)
  -P PRIORITY	Set process priority (0)
  -m		Lock memory
  -x		Don't control clock
  -N FD		Notify supervisor
  -v, --version	Print version and exit
  -h, --help	Print usage and exit