POWERCMD syntax

	POWERCMD $<$function$>$	[-c class[,class]...] [-n node[,node]...] [-p property[,property]...]
		$<$command$>$

• function can be one of: ON,OFF,CYCLE,STATUS,LEDON,LEDOFF,LEDSTATUS
• command is the shell command to use to perform the given function. Any valid bash command sequence, including pipes/redirects, is acceptable.
• -c limits the directive to apply only to the given classes.
• -n limits the directive to apply only to the given nodes.
• -p limits the directive to apply only to nodes having one or more of the given properties.

Every command must reference the spec_id of a SPECFORMAT directive (see section 5.15) by including `SPEC:spec_id' in the appropriate place in the command sequence. The `SPEC:spec_id' text gets replaced with a hostname, or a range, etc., as defined in the SPECFORMAT corresponding to spec_id.

A simple hostname format may work in most cases, but may not operate as fast as one of the range formats. When using the hostname or ipaddr specformats, command is interpolated to replace any instance of `$NODE' or `$IP' with the hostname or IP address of the node being operated on, respectively.