DHCP_RELEASE(1) General Commands Manual DHCP_RELEASE(1)NAME
dhcp_release - Release a DHCP lease on a the local dnsmasq DHCP server.
SYNOPSIS
dhcp_release <interface> <address> <MAC address> <client_id>
DESCRIPTION
A utility which forces the DHCP server running on this machine to release a DHCP lease.
Send a DHCPRELEASE message via the specified interface to tell the local DHCP server to delete a particular lease.
The interface argument is the interface in which a DHCP request _would_ be received if it was coming from the client, rather than being
faked up here.
The address argument is a dotted-quad IP addresses and mandatory.
The MAC address is colon separated hex, and is mandatory. It may be prefixed by an address-type byte followed by -, eg
10-11:22:33:44:55:66
but if the address-type byte is missing it is assumed to be 1, the type for ethernet. This encoding is the one used in dnsmasq lease files.
The client-id is optional. If it is "*" then it treated as being missing.
NOTES
MUST be run as root - will fail otherwise.
LIMITATIONS
Only usable on IPv4 DHCP leases.
SEE ALSO dnsmasq(8)AUTHOR
This manual page was written by Simon Kelley <simon@thekelleys.org.uk>.
DHCP_RELEASE(1)
Check Out this Related Man Page
dhclient.leases(5) File Formats Manual dhclient.leases(5)NAME
dhclient.leases - DHCP client lease database
DESCRIPTION
The Internet Systems 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 format of the lease declarations is described in dhclient.conf(5).
FILES
DBDIR/dhclient.leases
SEE ALSO dhclient(8), dhcp-options(5), dhclient.conf(5), dhcpd(8), dhcpd.conf(5), RFC2132, RFC2131.
AUTHOR dhclient(8) was written by Ted Lemon under a contract with Vixie Labs. Funding for this project was provided by Internet Systems Consor-
tium. Information about Internet Systems Consortium can be found at https://www.isc.org.
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