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Top Forums Shell Programming and Scripting Trigger the script if it is first sunday of the quarterly month Post 302963452 by bakunin on Wednesday 30th of December 2015 02:53:49 PM
Old 12-30-2015
Quote:
Originally Posted by Aia
Since minute hour 1-7 3,6,9,12 0 command_string would run every day from 1 to 7 and also every Sunday, perhaps this might do it.
Code:
minute hour * 3,6,9,12 0 [ $(/usr/bin/date +%e) -le 7 ] && /path/to/script

Yes, this would do it. But it might be a bit "tidier" (for lack of a better word) to have everything in one place (like the scripts text) than spread over several places (part of the logic in cron, part of the logic in the script. If you put [ $(/usr/bin/date +%e) -le 7 ] && into the scripts text or into the commandline of the cron command should (otherwise) make no big difference.

At least this is my personal POV on the matter and maybe only makes sense because of the acquired style i work in. Technically there is no real difference and with another way of doing things the opposite may make equal sense.

I hope this helps.

bakunin
 

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DATE(1) 						      General Commands Manual							   DATE(1)

NAME
date - print or set the date and time SYNOPSIS
date [-qsu] [[MMDDYY]hhmm[ss]] [+format] OPTIONS
-q Read the date from stdin -s Set the time (implicit for -q or a date string) -u Print the date as GMT -t Use this number of seconds instead of current time EXAMPLES
date # Print the date and time date 0221921610 # Set date to Feb 21, 1992 at 4:10 p.m. DESCRIPTION
With the -q flag or a numeric argument, date sets the GMT time and date. MMDDYY refers to the month, day, and year; hhmmss refers to the hour, minute and second. Each of the six fields must be exactly two digits, no more and no less. date always display the date and time, with the default format for the system. The -u flag request GMT time instead of local time. A format may be specified with a + followed by a printf-like string with the following options: %% % character %A Name of the day %B Name of the month %D mm/dd/yy %H Decimal hour on 2 digits %I Decimal hour modulo 12 on 2 digits %M Decimal minute on 2 digits %S Decimal seconds on 2 digits %T HH:MM:SS %U Decimal week number, Sunday being first day of week %W Decimal week number, Monday being first day of week %X Same as %T %Y Decimal year on 4 digits %Z Time Zone (if any) %a Abbreviated name of the day %b Abbreviated name of the month %c Appropriate date & time (default format) %d Decimal day of the month on 2 digits %e Same as %d, but a space replaces leading 0 %h Same as %b %j Decimal dey of the year on 3 digits %m Decimal month on 2 digits %n Newline character %p AM or PM %r 12-hour clock time with AM/PM %s Number of seconds since the epoch %t Tab character %w Decimal day of the week (0=Sunday) %x Same as %D %y Decimal year on 2 digits SEE ALSO
time(2), ctime(3), readclock(8). DATE(1)
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