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*condor_power*
===============
send packet intended to wake a machine from a low power state
:index:`condor_power<single: condor_power; HTCondor commands>`\ :index:`condor_power command`
Synopsis
--------
**condor_power** [**-h** ]
**condor_power** [**-d** ] [**-i** ] [**-m** *MACaddress*]
[**-s** *subnet*] [*ClassAdFile* ]
Description
-----------
*condor_power* sends one UDP Wake on LAN (WOL) packet to a machine
specified either by command line arguments or by the contents of a
machine ClassAd. The machine ClassAd may be in a file, where the file
name specified by the optional argument *ClassAdFile* is given on the
command line. With no command line arguments to specify the machine, and
no file specified, *condor_power* quietly presumes that standard input
is the file source which will specify the machine ClassAd that includes
the public IP address and subnet of the machine.
*condor_power* needs a complete specification of the machine to be
successful. If a MAC address is provided on the command line, but no
subnet is given, then the default value for the subnet is used. If a
subnet is provided on the command line, but no MAC address is given,
then *condor_power* falls back to taking its information in the form of
the machine ClassAd as provided in a file or on standard input. Note
that this case implies that the command line specification of the subnet
is ignored.
*condor_power* relies on the router receiving the WOL packet to
correctly broadcast the request. Since routers are often configured to
ignore requests to broadcast messages on a different subnet than the
sender, the send of a WOL packet to a machine on a different subnet may
fail.
Options
-------
**-h**
Print usage information and exit.
**-d**
Enable debugging messages.
**-i**
Read a ClassAd that is piped in through standard input.
**-m** *MACaddress*
Specify the MAC address in the standard format of six groups of two
hexadecimal digits separated by colons.
**-s** *subnet*
Specify the subnet in the standard form of a mask for an IPv4
address. Without this option, a global broadcast will be sent.
Exit Status
-----------
*condor_power* will exit with a status value of 0 (zero) upon success,
and it will exit with the value 1 (one) upon failure.
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