cron entry

UNIX Solaris
1

Hi,

I have to add two cron entry now. Please correct me if anything wrong

Below script should run at every one and half hour.

30 01 * * * /export/home/gxadm/scripts/collect_mq_info.pl $HOME/GCSS/logs > /dev/null 2>&1

Below script should run at every 2 hours

0 02 * * * /export/home/gxadm/scripts/copylog.sh > /dev/null 2>&1

Please help me !!

2

This would run the script once a day at 01:30 am. If you want to run the script every 90 minutes, you need two entries in the crontab, like:

0 0,3,6,9,12,15,18,21 * * * /export/....
30 1,4,7,10,13,16,19,22 * * * /export/....

(assuming you want every 90 minutes starting at midnight).

Same here. To run this script every two hours you need:

0 0,2,4,6,8,10,12,14,16,18,20,22 * * * /export/...

Note: Solaris' cron does not support the slash notation, like

0 */2 * * * /export/...
3

Oh thank, Please help
I want to run at every 30 minutes in this script :

30,60 * * * * /export/home/gxadm/scripts/collect_mq_info.pl $HOME/GCSS/logs > /dev/null 2>&1

Below script at every 45 minutes

45,90 * * * * /export/home/gxadm/scripts/copylog.sh > /dev/null 2>&1

Please give advice how to make entry !! Please

4

Every 30 minutes would be:

0,30 * * * * ....

Every 45 minutes would need 3 lines:

0,45 0,3,6,9,12,15,18,21 * * * ....
30 1,4,7,10,13,16,19,22 * * * ....
15 2,5,8,11,14,17,20,23 * * * ...

Note, that the first field in the crontab helds the minutes on the clock, not an interval.

5

Oh Thank you so much . finally I have entered like this

30 minutes : 30 1,4,7,10,13,16,19,22 * * * script
45 minutes :  0,45 0,3,6,9,12,15,18,21 * * * script

Thank you .

Mani

6

Crontab Tutorial (Cron Tutorial) - Online Training and Tutorials

7

Thank you

8

This means, that you start your script at
01:30, 04:30, 07:30, etc. in the first case and at
00:00, 00:45, 03:00, 03:45, etc. in the second case.
I guess that is not your intention.

9

Oh my god ! so I have to go like this ,

30,60,90....1440 * * * * script
45,90,135 ...etc * * * * script

If you have exact syntax please help me

Thanks,
Mani

10

No!

The first field holds minutes on the clock and the second field hours. So the entry

0,30 0,3,6 * * *

means, that the job is run at every time on the clock which is a combination of 0 or 3 or 6 hours and 0 or 30 minutes, which is 00:00, 00:30, 03:00; 03:30, 06:00 and 06:30.