cron job(s) not running

Hi all,

I am having an issue with my cron jobs not running, so my /etc/crontab looks like this:

59 23 * * * root /srv/script

This hasn't run for the last three days, the script does a SQL backup, so what I done was created a cron job like the below:

00 09 * * * env > /tmp/env.output

But this file is never created, I have run the command in terminal to confirm that is OK, I've also checked that the cron service is running.

Is there a log file I can review to see why this failed?

Thanks!