Variable Substitution

A number of the alert parameters allow you to insert a variable which will be substituted for a value when the alert happens.  Here is a list.

$hostHost name (or IP address, if no name exists).
$hostipThe host IP address
$hostdnsnameThe resolved DNS name for the host
$yearCurrent Year
$monthCurrent Month
$dayCurrent day of month
$hourCurrent hour
$minuteCurrent minute
$secondCurrent second
$dateSame as $year-$month-$day.
$timeThe same as $hour$minute - note the absence of any punctuation - that's to make sure the file name is valid, if this mask is being used in a file name.