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Changes between Initial Version and Version 1 of Ticket #23133, comment 18

initial	v1
3	3	In addition, some hosts may have defined an external cron and that, too, might be broken - and the user still ought to be informed.
4	4
5		A technique which might work is to schedule a cron job to run once every 12 hours. The cron job sets a timestamp, and if that timestamp becomes stale (say, 48 hours old) then we let the user know that cron might be broken, and give them a link to click.
	5	A technique which might work is to schedule a cron job to run once every 12 hours. The cron job sets a timestamp (which is set to a default value of the current time if empty), and if that timestamp becomes stale (say, 48 hours old) then we let the user know that cron might be broken, and give them a link to click.
6	6
7	7	The link brings them to a page which checks the loopback functionality, and lets the user choose from available options, like: