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- <h3>Fields order</h3>
- <pre>
- +---------------- minute (0 - 59)
- | +------------- hour (0 - 23)
- | | +---------- day of month (1 - 31)
- | | | +------- month (1 - 12)
- | | | | +---- day of week (0 - 7) (Sunday=0)
- | | | | |
- * * * * *
- </pre>
- <p>Each of the patterns from the first five fields may be either * (an asterisk),
- which matches all legal values, or a list of elements separated by commas (see below).</p>
- <p>For "day of the week" (field 5), 0 is considered Sunday, 6 is Saturday
- (7 is an illegal value)</p>
- <p>A job is executed when the time/date specification fields all match the current
- time and date. There is one exception: if both "day of month" and "day of week"
- are restricted (not "*"), then either the "day of month" field (3) or the "day of week"
- field (5) must match the current day (even though the other of the two fields
- need not match the current day).</p>
- <h3>Fields operators</h3>
- <p>There are several ways of specifying multiple date/time values in a field:</p>
- <ul>
- <li>The comma (',') operator specifies a list of values, for example: "1,3,4,7,8"</li>
- <li>The dash ('-') operator specifies a range of values, for example: "1-6", which is equivalent to "1,2,3,4,5,6"</li>
- <li>The asterisk ('*') operator specifies all possible values for a field. For example, an asterisk in the hour time field would be equivalent to 'every hour' (subject to matching other specified fields).</li>
- <li>The slash ('/') operator (called "step") can be used to skip a given number of values. For example, "*/3" in the hour time field is equivalent to "0,3,6,9,12,15,18,21".</li>
- <li>The plus ('+') operator (called "offset") can be used as an offset to a given range. For example, "*/10+2" in the hour minute field is equivalent to "2,12,22,32,42,52".</li>
- </ul>
- <h3>Examples</h3>
- <pre>
- */15 * * * : Execute job every 15 minutes
- 0 2,14 * * *: Execute job every day at 2:00 and 14:00
- 0 2 * * 1-5: Execute job at 2:00 of every working day
- 0 12 1 */2 1: Execute job every 2 month, at 12:00 of first day of the month OR at every monday.
- </pre>
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