dhcpd --version (return code: 0)
dhcpd -HELP (return code: 1)
Internet Systems Consortium DHCP Server 4.3.5 Copyright 2004-2016 Internet Systems Consortium. All rights reserved. Unknown command --help Usage: dhcpd [-p <UDP port #>] [-f] [-d] [-q] [-t|-T] [-4|-6] [-cf config-file] [-lf lease-file] [-user user] [-group group] [-chroot dir] [-tf trace-output-file] [-play trace-input-file] [-pf pid-file] [--no-pid] [-s server] [if0 [...ifN]] If you think you have received this message due to a bug rather than a configuration issue please read the section on submitting bugs on either our web page at www.isc.org or in the README file before submitting a bug. These pages explain the proper process and the information we find helpful for debugging.. exiting.