Change an Alarm Reminder
You use the alarm –edit command to change the frequency of alarm notifications. The alarm must have been acknowledged before you can modify the reminder. If an alarm has not already been acknowledged, you can set the notification frequency when you acknowledge the alarm.
The following example shows the command to modify the notification of alarm ID 9 to be tripped every four hours.
$ alarm --edit 9 --remind_every 4
--remind_every_unit hours