I have written a cronjob, something like

crontab -e
##This is an example
18 18 04 10 3 ./executable

I have also done:

/etc/init.d/cron enable
/etc/init.d/cron start

When I reboot my openWRT router, and check crontab -l
There isn't any cron job inside the router.
I have tried following things:

  • Within in the daemon, I have enabled cronjob.

  • I have also written linux script:
    crontab -l 2 /dev/null; echo "27 04 08 22 2017 ./executable | crontab -"