Unix: Cron format

minute (0-59),
|       hour (0-23),
|       |        day of the month (1-31),
|       |        |        month of the year (1-12),
|       |        |        |        day of the week (0-6 with 0=Sunday).
|       |        |        |        |        command
0       2        *        *        0,4      /etc/cron.d/logchecker