> Running `crontab -e` as a non-root user will edit that user's crontab, and running it as root will edit the system crontab.
Running it as root will edit the root user's crontab (in /var/spool/cron), which is separate from the system crontab (/etc/crontab), which has a slightly different format.
Running it as root will edit the root user's crontab (in /var/spool/cron), which is separate from the system crontab (/etc/crontab), which has a slightly different format.