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Full Discussion: Need help regarding cronjob scheduling
Top Forums UNIX for Dummies Questions & Answers Need help regarding cronjob scheduling Post 302919304 by bakunin on Tuesday 30th of September 2014 09:50:52 AM
Old 09-30-2014
As always with cron scripts: watch out for Cron Problem Number One.

In addition i strongly suggest to add redirections to your crontab entries:

Code:
0,5,10,15,20,25,30 22 * * * /path/to/your/script >/dev/null 2>/dev/null

Otherwise whatever your script produces as output would be sent to you via mail. If you want to preserve any output replace /dev/null with the name of a log file but never have any entry without such a redirection.

I hope this helps.

bakunin

/PS: i prefer using this style of redirection because it is not dependent on order. The following to lines do the same:
Code:
0,5,10,15,20,25,30 22 * * * /path/to/your/script 1>/dev/null 2>/dev/null
0,5,10,15,20,25,30 22 * * * /path/to/your/script 2>/dev/null 1>/dev/null

whereas these two lines produce different results:
Code:
0,5,10,15,20,25,30 22 * * * /path/to/your/script >/dev/null 2>&1
0,5,10,15,20,25,30 22 * * * /path/to/your/script 2>&1 >/dev/null

bakunin
This User Gave Thanks to bakunin For This Post:
abhi_123
 

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LEARN ABOUT SUNOS

dminfo

dminfo(1M)						  System Administration Commands						dminfo(1M)

NAME

       dminfo - report information about a device entry in a device maps file

SYNOPSIS

       dminfo [-v] [-a] [-f pathname]

       dminfo [-v] [-a] [-f pathname] -n dev -name...

       dminfo [-v] [-a] [-f pathname] -d dev -path...

       dminfo [-v] [-a] [-f pathname] -t dev -type...

       dminfo [-v] [-f pathname] -u dm -entry

DESCRIPTION

       dminfo reports and updates information about the device_maps(4) file.

OPTIONS

       The following options are supported

       -a		       Succeed	if  any  of the requested entries are found. If used with -v, all entries that match the requested case(s)
			       are printed.

       -d dev-path	       Search by dev-path. Search device_maps(4) for a device special pathname	in  the  device_list  field  matching  the
			       dev-path argument. This option cannot be used with -n, -t or -u.

       -f pathname	       Use a device_maps file with pathname instead of /etc/security/device_maps.

       -n dev-name	       Search  by  dev-name.  Search  device_maps(4) for a device_name field matching dev-name. This option cannot be used
			       with -d, -t or -u.

       -t dev-type	       Search by dev-type. Search device_maps(4) for a device_type field matching the given dev-type. This  option  cannot
			       be used with -d, -n or -u.

       -u dm-entry	       Update  the  device_maps(4)  file.  This option is provided to add entries to the device_maps(4) file. The dm-entry
			       must be a complete device_maps(4) file entry. The dm-entry has fields, as in the  device_maps  file.  It  uses  the
			       colon (:) as a field separator, and white space as the device_list subfield separators. The dm-entry is not made if
			       any fields are missing, or if the dm-entry would be a duplicate. The default device maps file can be  updated  only
			       by the super user.

       -v		       Verbose. Print the requested entry or entries, one line per entry, on the standard output. If no entries are speci-
			       fied, all are printed.

EXIT STATUS

       0	       Successful completion.

       1	       Request failed.

       2	       Incorrect syntax.

FILES

       /etc/security/device_maps

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       bsmconv(1M), device_maps(4), attributes(5)

NOTES

       The functionality described in this man page is available only if the Basic Security Module (BSM) has been enabled.   See  bsmconv(1M)  for
       more information.

SunOS 5.10							    6 May 1993								dminfo(1M)
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