Help with UNIX Crontab!

Question

I want to shedule a task for 8.30am every Monday, for every month, for every year...

What would the UNIX Crontab format be?

Many thanks

O.

What server type/OS... Weekdays can be different on crons for different systems.. — Arenstar, Nov 14 '10 at 18:42
How can this answer (2010) be a duplicate of a question that was asked after this one (2012)? This question is older — Katie, Aug 10 '18 at 23:43

score 6 · Answer 1 · answered Nov 14 '10 at 18:26

6

You would put the crontab entry like this:

30 8 * * 1 COMMAND

The first field is minutes, the second is hours, and the fifth is days of the week (where Sunday is 0).

answered Nov 14 '10 at 18:26

Avi

score 1 · Answer 2 · answered Nov 14 '10 at 18:27

1

30 8 * * 1

See also 'man 5 crontab'

answered Nov 14 '10 at 18:27

Chris

score 1 · Answer 3 · answered Nov 14 '10 at 18:28

1

#minute hour    mday    month   wday
30      8       *       *       1

answered Nov 14 '10 at 18:28

score 0 · Answer 4 · answered Nov 14 '10 at 18:27

0

30 8 * * 1 <command>

answered Nov 14 '10 at 18:27

rubayeet

score 0 · Answer 5 · answered Nov 14 '10 at 18:59

0

When I was starting out with Linux/UNIX, I found something like this was quite useful.

I think this one is slightly easier to use.

answered Nov 14 '10 at 18:59

Tom O'Connor

I'm going with the "Teach a man to fish" analogy here, only teaching him to fish with Dynamite. – Tom O'Connor Nov 14 '10 at 19:02

score 0 · Answer 6 · answered Jul 24 '14 at 15:57

0

You might find http://www.opsschool.org/en/latest/cron_101.html useful too. That's where I found http://cronchecker.net/ to verify my cron commands in plain english.

answered Jul 24 '14 at 15:57

Spncr2

6 Answers6