daily cron job for reboot?

[thepiston]

I'd like to reboot my server every night at 3am. I've never written a cron or know how to go about it - can anyone show me where to go?

[Titan8990]

Here is the forum's crontab tutorial: http://ubuntuforums.org/showthread.php?t=102626&highlight=cron

[HalPomeranz]

https://help.ubuntu.com/community/CronHowto

Btw, you shouldn't really need to reboot your machine every night. Why do you feel this is necessary? Maybe there's something wrong with your setup that should be corrected...

[Titan8990]

I agree, all my machines run 24/7.

[thepiston]

there's a nuance in our software that causes comboboxes to stall unless it's rebooted - i'm just doing this as a patch until we fix the problem.

One problem - everytime I input "sudo reboot" it asks me for my password. Do I need to do anything about that or can I just add this:


00 03 * * * sudo reboot

[Titan8990]

That will not work. You will need to make the cron job as root to do commands that require root access. You can't "sudo" in scripts.

[thepiston]

That will not work. You will need to make the cron job as root to do commands that require root access. You can't "sudo" in scripts.
I was root when I created the cron, is that what you mean?

[ukripper]

you can create bash script and add
00 03 * * * reboot to it and place that bash script to /etc/rc.local so you don't have to put any password.

alternatively, go for editing sudoers route.

[HalPomeranz]

I was root when I created the cron, is that what you mean?

That's what they meant. If you're adding the reboot command to root's crontab, you don't need the "sudo" statement because the command will be run with root privileges by cron.

[thepiston]

ok, gotcha - i'll remove it