The Internet Software Consortium DHCP client keeps a persistent
database of leases that it has acquired that are still valid.
The database is a free-form ASCII file containing one valid declaration
per lease.
If more than one declaration appears for a given lease,
the last one in the file is used.
The file is written as a log, so this is not an unusual occurrence.
The lease file is named
dhclient.leases.IFNAME,
where
IFNAME
represents the network interface the DHCP client acquired the lease on.
For example, if
dhclient(8)
is configured for the
em0
network device,
the lease file will be named
dhclient.leases.em0.
The format of the lease declarations is described in
dhclient.conf(5).
