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Configure a cron job to run only if laptop is plugged in?

rated 0 times [ 1] [ 0] / answers: 1 / hits: 849 / 1 Year ago, mon, december 12, 2022, 6:08:04

I'm setting up a cron job to update my nmzmail database periodically, but I'd like the cron job to execute only if my laptop is plugged in. Is there a way to do this? If there's not a built in cron command, then is there a way to check via the command line that I could use in a simple script?

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weamp

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answered 1 Year ago rcraftemur · Accepted Answer

I would expand a bit on the first answer, and instead do something like this for a cron entry:

[ $(cat /proc/acpi/ac_adapter/AC/state | awk '{print $NF}') = 'on-line' ] && /path/to/your/script_file

I would rather not even start my script, unless the test is successful. In this instance cron will never start the script, if the laptop is on battery.