I have encountered a limitation of the watch command.
Even though I specify
watch -n 14400 to run the command every 4 hours or so, the command executes every 4200 or so seconds, which is about an hour's worth of wait. Otherwise very useful command, is there a way to extend the range beyond 4200 seconds.
I think the limit comes from time being measured in microseconds and 4200 million micro seconds, and 4200 M is 2^32 or something.