/usr/bin/zgenhostid: invalid option -- '-'
usage: zgenhostid [-fh] [-o path] [value]

  -f		 force hostid file write
  -h		 print this usage and exit
  -o <filename>	 write hostid to this file

If hostid file is not present, store a hostid in it.
The optional value should be an 8-digit hex number between 1 and 2^32-1.
If the value is 0 or no value is provided, a random one will be generated.
The value must be unique among your systems.