Crontab Issue

yerunkar11 · 05-17-2017, 07:56 AM

Hello,

Thank you in advance.

I want to schedule an cronjob that will run for every 5 minutes past 8:30 am to 5:30 am.

The issue is I can schedule it for 8am to 5pm but cannot define minutes in cronjob.
For this I have done this

*/5 8,9,10,11,12,13,14,15,16,17 * * *

TB0ne · 05-17-2017, 08:17 AM

Quote:

Originally Posted by yerunkar11

I want to schedule an cronjob that will run for every 5 minutes past 8:30 am to 5:30 am. The issue is I can schedule it for 8am to 5pm but cannot define minutes in cronjob. For this I have done this

*/5 8,9,10,11,12,13,14,15,16,17 * * *

The first field is minutes, and you've successfully scheduled it to run every five minutes between 8AM and 5 PM. I'm assuming you want it to start at 8:30 AM, and end at 5:30 PM, which is your problem, right?

Handy cron field explanation...suitable for inclusion in your crontab file

Code:

# *     *     *   *    *        command to be executed
# -     -     -   -    -
# |     |     |   |    |
# |     |     |   |    +----- day of week (0 - 6) (Sunday=0)
# |     |     |   +------- month (1 - 12)
# |     |     +--------- day of        month (1 - 31)
# |     +----------- hour (0 - 23)
# +------------- min (0 - 59)

Personally, I'd define three jobs:

Code:

30-59/5  8    * * * job 
*/5      9-17 * * * job
0-30/5   17   * * * job

That will run the job starting at 8:30 AM every five minutes, until 9 AM. That's when the second line (9 AM-5 PM) comes into play, running it every five minutes. Then from 5 PM to 5:30 PM (every five minutes), the third line applies.

MensaWater · 05-17-2017, 08:22 AM

Presumably you meant 5:30 PM rather than 5:30 AM.

You don't need to enumerate all the hours in a range so your original:
*/5 8,9,10,11,12,13,14,15,16,17 * * *

Should more simply be written as:
*/5 8-17 * * *

I'm assuming you mean you want to run at 8:30, 8:35, 8:40, 8:45, 8:55 and 17:00 17:05, 17:10, 17:15, 17:20, 17:25 & 17:30 but then ever 5 minutes all other hours.

You'd need to add multiple cron lines to achieve that

First for hours 09 to 16 (9 AM to 4 PM) you'd do the time spec:
*/5 9-16 * * *

For your start at 8:30AM :
30,35,40,45,50,55 8 * * *

For your end at 5:30 PM
00,05,10,15,20,25,30 17 * * *

michaelk · 05-17-2017, 08:23 AM

I would just use three separate cron jobs.

30-55/5 8 * * *
*/5 9-16 * * *
0-30/5 17 * * *

To late...

yerunkar11 · 05-18-2017, 05:19 AM

Thank you all..

All solution solved my issue.

in the end I'll be adding 3 Cronjobs