Cron reboot loop (solved)

stuCONNERS · July 2, 2016 at 12:41 PM

Ive set up a cron for a reboot at 6 am each day. Ive discovered this morning that the box is going into a reboot loop for exactly 1 hour. Ive got the kodi log here 06:58:27 T:140486996547648 NOTICE: special://profile/ is mapped to: special: - Pastebin.com I only noticed this this morning but it shows the last reboot before it stopped at 7 am.

My cron looks like this:
* 6 * * * reboot

My chromebox is rebooting at 6 am like expected. im bothered about this damaging my hard drive as its spinning up and down for an hour for no reason.

Grimson · July 2, 2016 at 12:58 PM

Well of course, once the system is rebooted the cronjobs will be activated and as it is still 6 am cron will reboot the device again. This is not a bug but a user error.

So make this:

Code

0 6 * * * reboot

and it should only reboot at exactly 6:00 am. Depending on how fast it boots it may still reboot twice, but not for a whole hour.

stuCONNERS · July 2, 2016 at 4:45 PM

I`ll give it a shot. I stil dont understand why * 6 * * * would cause a reboot at 6:45 am, But thanks for the answer cheers

Grimson · July 2, 2016 at 5:26 PM

Quote from stuCONNERS

I stil dont understand why * 6 * * * would cause a reboot at 6:45 am, But thanks for the answer cheers

Because the * is a wildcard, it will match anything. So with the above any minute from 6:00 am to 6:59 am is matched. If you want something to happen at a precise time, you'll need to specify a precise time.