Provided by: isc-dhcp-server_4.4.3-2ubuntu4_amd64
dhcp-lease-list - Prints active DHCP leases.
--help Shows command line help --parsable machine readable output with full dates --last prints the last (even if end<now) for every MAC --all prints all entries i.e. more than one per MAC
dhcp-lease-list shows the dhcpd.leases file but filters, depending on the specified command line options, obsolete entries.
/var/lib/dhcp3/dhcpd.leases dhcpd leases /usr/share/misc/oui.txt or /usr/local/etc/oui.txt optional file to map MAC addresses to manufactorer names