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Top Forums Shell Programming and Scripting Shell script to generate daily crontab entries between to specific dates Post 302375362 by JM_86 on Friday 27th of November 2009 12:00:58 PM
Old 11-27-2009
Shell script to generate daily crontab entries between to specific dates

Hi,

I am currently writing a shell script to enter daily reoccurring jobs into the crontab. I want to be able to specify any two dates for which I want these daily jobs to run between.

Below is an example of what I need to be written to crontab.

# Give a start day of 21/10/2009 09:00 and end day of 23/10/2009 09:00, we need the following crontab entries:

# 00 09 22 10 0-7 script.sh 10/21/2009 10/22/2009
# 00 09 23 10 0-7 script.sh 10/22/2009 10/23/2009

Currently, I am assuming that the two date span within a month, but I want to extend this so that the dates can span across any time frame.

How would I go about running through all the days between 2 particular dates?

Any help would be much appreciated.

Thanks,

Jess
 

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sa1(8)							    BSD System Manager's Manual 						    sa1(8)

NAME
sa1 -- Generate a system activity daily data file. SYNOPSIS
/usr/lib/sa/sa1 [t n] DESCRIPTION
The sa1 command is a shell script used to invoke the system activity data collector, sadc. The binary sample data is collected at intervals t seconds apart, in a loop n times. The binary sample data is written to the standard daily data file, /var/log/sa/sadd where the dd repre- sents the current day of the month. sa1 is intended to be started by cron. EXAMPLE CRON ENTRY
# Starting at 8am collect system activity records # every 20 minutes for 12 hours # 20 minutes = 1200 seconds # 12 hours with 3 samples each hour = 36 loops 0 8 * * 1-5 /usr/lib/sa/sa1 1200 36 # After the 12 hour period, # collect a system activity report 30 20 * * 1-5 /usr/lib/sa/sa2 -A FILES
/var/log/sa/sadd Default daily activity file that holds the binary sampling data. dd are digits that represent the day of the month. SEE ALSO
crontab(1), fs_usage(1), netstat(1), sar(1), sc_usage(1), top(1), vm_stat(1), crontab(5), iostat(8), sa2(8), sadc(8) Mac OS X Jul 25 2003 Mac OS X
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