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Top Forums Shell Programming and Scripting Simpler crontab entry to execute pgm on last day of the month Post 302938506 by lsatenstein on Tuesday 17th of March 2015 06:39:52 AM
Old 03-17-2015
Simpler crontab entry to execute pgm on last day of the month

The following bash command line works for the last day of the month. Test by replacing the 1 with tomorrows day of month number
Code:
[ 1 == `date +%d -d '1 day'` ] && echo "Day before tomorrow"

Can it be used within crontab? As

Code:
*  * 28-31 *  *  [  '1' == `date +\%d -d '1 day'` ] && echo "Today ls last day of month" >>/tmp/crontabtest

I tried to test crontab with the above entry (forcing dates) and I was was not able to get results

Last edited by lsatenstein; 03-17-2015 at 07:48 AM.. Reason: Discovered that %d in crontab needs % to be escaped
 

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CALENDAR(1)						      General Commands Manual						       CALENDAR(1)

NAME
calendar - reminder service SYNOPSIS
calendar [ - ] DESCRIPTION
Calendar consults the file `calendar' in the current directory and prints out lines that contain today's or tomorrow's date anywhere in the line. Most reasonable month-day dates such as `Dec. 7,' `december 7,' `12/7,' etc., are recognized, but not `7 December' or `7/12'. If you give the month as ``*'' with a date, i.e. ``* 1'', that day in any month will do. On weekends `tomorrow' extends through Monday. When an argument is present, calendar does its job for every user who has a file `calendar' in his login directory and sends him any posi- tive results by mail(1). Normally this is done daily in the wee hours under control of cron(8). The file `calendar' is first run through the ``C'' preprocessor, /lib/cpp, to include any other calendar files specified with the usual ``#include'' syntax. Included calendars will usually be shared by all users, maintained and documented by the local administration. FILES
calendar /usr/libexec/calendar to figure out today's and tomorrow's dates /etc/passwd /tmp/cal* /lib/cpp, egrep, sed, mail as subprocesses SEE ALSO
at(1), cron(8), mail(1) BUGS
Calendar's extended idea of `tomorrow' doesn't account for holidays. 7th Edition October 21, 1996 CALENDAR(1)
All times are GMT -4. The time now is 01:10 AM.
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