Date: 2017mar17 OS: Linux Q. Linux: What's the format of the crontab file? A. Files in /etc/cron.d are:

# minute | hour | day-of-month | month | day-of-week | user | command 1 5 * * * myuser /usr/local/bin/mycommand

When you do

crontab -e

its just for you so its:

# minute | hour | day-of-month | month | day-of-week | command 1 5 * * * /usr/local/bin/mycommand

Lines that begin with # are comments.