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Full Discussion: Pass system date and sysdate-7 in script through crontab
Top Forums Shell Programming and Scripting Pass system date and sysdate-7 in script through crontab Post 302904244 by rbatte1 on Tuesday 3rd of June 2014 05:09:41 AM
Old 06-03-2014
Have a read of two things:-
  • The manual page for the date command
  • Search this forum for date and you will find lots of threads to do what you want.
You may need use cron to call a wrapper script that works these out and then calls the real script you want, e.g.:-
Code:
$ crontab -l
00 23 * * * /my_home/wrapper_script

Code:
$ cat wrapper_script
#!/bin/ksh

d1=20140603          # Need to get this from the date command
d2=20140527          # Need to calculate this from the date command

/usr/local/scripts/main_script $d1 $d2


I hope that this helps, but in any case:-
  • What have you tried so far?
  • What errors/output are you getting?
  • What OS and version are you using (some have more options on the date command)




Robin
 

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LEARN ABOUT REDHAT

crond

CRON(8) 						      System Manager's Manual							   CRON(8)

NAME

       cron - daemon to execute scheduled commands (Vixie Cron)

SYNOPSIS

       cron

DESCRIPTION

       Cron should be started from /etc/rc or /etc/rc.local.  It will return immediately, so you don't need to start it with '&'.

       Cron searches /var/spool/cron for crontab files which are named after accounts in /etc/passwd; crontabs found are loaded into memory.  Cron
       also searches for /etc/crontab and the files in the /etc/cron.d/ directory, which are in a different format (see  crontab(5)).	Cron  then
       wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute.  When execut-
       ing commands, any output is mailed to the owner of the crontab (or to the user named in the MAILTO environment variable in the crontab,	if
       such exists).

       Additionally,  cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab) has changed, and if it has,
       cron will then examine the modtime on all crontabs and reload those which have changed.	Thus cron need not be restarted whenever a crontab
       file is modified.  Note that the Crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.

SEE ALSO

       crontab(1), crontab(5)

AUTHOR

       Paul Vixie <paul@vix.com>

4th Berkeley Distribution					 20 December 1993							   CRON(8)
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