How to use crontab ?07.12.13

where each field is defined as
[min]	Minutes that program should be executed on. 0-59. Do not set as * or the program will be run once a minute.
[hour]	Hour that program should be executed on. 0-23. * for every hour.
[day of month]	Day of the month that process should be executed on. 1-31. * for every day.
[month]	Month that program whould be executed on. 1-12 * for every month.
[day of week]	Day of the week. 0-6 where Sunday = 0, Monday = 1, ...., Saturday = 6. * for every day of the week.
[program]	Program to be executed. Include full path information.

Here are some examples:

0,15,30,45 * * * * /usr/bin/foo

Will run /usr/bin/foo every 15 minutes on every hour, day-of-month, month, and day-of-week. In other words, it will run every 15 minutes for as long as the machine it running.

10 3 * * * /usr/bin/foo

Will run /usr/bin/foo at 3:10am on every day.

10 * 1 * * /usr/bin/foo

Will run /usr/bin/foo at 12:10am on the first day of the month.

10 * * 1 * /usr/bin/foo

Will run /usr/bin/foo at 12:10am on the first month of the year.

10 14 * * 1 /usr/bin/foo

Will run /usr/bin/foo at 2:10pm on every Monday.

Anonymous