RE: CRon help
- To: <premjhere@xxxxxxxxx>, "oracle-l" <oracle-l@xxxxxxxxxxxxx>, <thump@xxxxxxxxxxxxxxxx>, <John.Hallas@xxxxxxxxxxxxxxxxx>
- Date: Thu, 23 Jun 2005 08:55:34 -0700
Prem, I just re-read your email and I think we are in agreement, I just
misunderstood the first time I read it because I think I skipped over the
"something better, like this" line. Sorry for the confusion.
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Allen, Brandon
Sent: Thursday, June 23, 2005 8:47 AM
To: premjhere@xxxxxxxxx; oracle-l; thump@xxxxxxxxxxxxxxxx;
John.Hallas@xxxxxxxxxxxxxxxxx
Subject: RE: CRon help
Prem,
I believe the following command will work as advertised:
0 1 8-14 * * [ "$(date +\%a)" == "Sat" ] && script_with_no_date_logic
Yes, the command "[ "$(date +\%a)" == "Sat" ] && script_with_no_date_logic"
will run every day between the 8th and 14th of each month, but due to the &&
operator, the script_with_no_date_logic will only be executed if [ "$(date
+\%a)" == "Sat" ] evaluates to TRUE, so in other words, the script portion of
the command will only be executed on Saturdays that fall between the 8th and
14th.
Only way to find out for sure is to test it.
Regards,
Brandon
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Prem
Sent: Thursday, June 23, 2005 3:50 AM
To: oracle-l; thump@xxxxxxxxxxxxxxxx; John.Hallas@xxxxxxxxxxxxxxxxx
Subject: RE: CRon help
Hi John , the same thread had this too : )
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
From the crontab documentation (man page):
"Note: The day of a command's execution can be specified by two fields
-- day of month, and day of week. If both fields are restricted
(ie, aren't *), the command will be run when _either_ field matches
the current time. For example, ``30 4 1,15 * 5'' would cause a
command to be run at 4:30 am on the 1st and 15th of each month, plus
every Friday."
So the example below would run every Saturday plus 8th-14th of the
month, not what you want.
A quick search of Google gives you something better, like this:
0 1 8-14 * * [ "$(date +\%a)" == "Sat" ] && script_with_no_date_logic
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Regards,
Prem.
-----Original Message-----
>> From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On >> Behalf Of Hallas, John,
Tech Dev
>> Charlotte Hammond suggested this to a similar question recently
>> Something like this (1am on 2nd Saturday):
>> 00 01 8,9,10,11,12,13,14 * 6 /app/my_saturday_job.sh
>> Takes advantage of the fact that the second Saturday can only
possibly fall in >> the range of dates 8th to the 14th of the month
(and no other Saturday can fall on >> those days!)
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