Lists can also be combined with each other, or with steps:
* 12 1-15,17,20-25 * * command
Will run cmd every midday between the 1st and the 15th as well as the
20th and 25th (inclusive) and also on the 17th of every month.
* 12 10-16/2 * * backup.sh
is the same as:
* 12 10,12,14,16 * * backup.sh
When using the names of weekdays or months, it isn't case sensitive,
but only the first three letters should be used, e.g. Mon, Sun or Mar,
Jul.
Comments are allowed in crontabs, but they must be preceded with a '#',
and must be on a line by them self.