ntozier [unknown] webserver is running as what user?
Let's ask this another way. Webserver services run as a user on the system.
Ubuntu and Debian use www-data. IIS uses IIS_IUSRS. CentOS uses to use apache.
What user us your system using? You said that you are running Ubuntu (which i do not run) so my guess is that your web user is www-data.
If this is the case, then why are you running the cronjob as nobody (see your original post)?