# properly to 4:31 on reboot before cron starts. # and touch a file in /etc so clock will be set # Note: To avoid infinite reboot loop, wait 70 seconds One solution for cron is to use a delay and touch a file in /etc before reboot: # Reboot at 4:30am every day Then cron starts and notices a few seconds later that the required boot moment has again arrived and reboots again… (At the end of the boot process ntpd starts, and it may also take a while before ntpd gets and sets the correct time, so cron may start the reboot in between.) So, in the boot process the clock gets set backwards a few seconds to that file's timestamp. The most recent file is possibly a status file or config file, modified maybe 30 seconds before the reboot initiated by cron. In the boot process the clock is initially set by sysfixtime to the most recent timestamp of any file found in /etc. This could lead to a never-ending loop of reboot. This is not as simple as it seems, becomes router usually have no real-time clock. So if you want to reboot our router every day at 4.30 in the morning you write somehing like:Īctually five fields (like you listed in also read the advice from wiki (about avoiding reboot loop): It has six fields (minute, hour, day of month, month, day of week). I just want to setup my Pi so than at power up, it starts to boot, waits a few seconds then runs EFIS.py, what ever way is easiest and reliable is what I'm looking for. If you can, reboot router is a good practice. Then click Save, and Apply Settings buttons. Select Enable, then enter the scripts in the Cron Jobs box below. I know a lot of you are way smatter than me. Go to Administration > Management There is one section called Cron. I came up with this from looking at an example, not sure why & is needed or what that does, but either way, when I reboot it just reboot and logs in to the GUI and nothing else happens. This is what I put in my crontab /bin/sleep 5 cd home/pi/元9/EFIS/ & python EFIS.py How-To Geek explains how to install the BiTorrent client Transmission on DD-WRT.
It’s time to install a Transmission and shift gears. We’ve already put your DD-WRT router in first gear with the power of the Opkg package manager. Since this will be directly at reboot and the Pi won't be logged in as pi, I don't think I'll need to run with sudo. How-To Geek explains how to install the BiTorrent client Transmission on DD-WRT. So now I'm trying to setup crontab to run at reboot, giving it a 5 second delay. I go to the command prompt, change to the folder 元9/EFIS then run EFIS.py but I have to run as sudo since it needs root access, so it all looks like this: This is my first time trying to setup cron to run a script normal startup my pi boots to the GUI and is logged in as user pi.
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