----- Original Message ----- 
From: "Gideon N. Guillen" <[EMAIL PROTECTED]>
To: "Philippine Linux Users Group Mailing List" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Monday, September 20, 2004 1:17 PM
Subject: Re: [plug] every 1st Friday of every month


> On Mon, 20 Sep 2004 12:24:33 +0800, Jett Tayer <[EMAIL PROTECTED]> wrote:
> > need to do this via cron. tulong naman.
>
> from "man -S5 crontab":
>               field          allowed values
>               -----          --------------
>               minute         0-59
>               hour           0-23
>               day of month   1-31
>               month          1-12 (or names, see below)
>               day of week    0-7 (0 or 7 is Sun, or use names)
>
> Assuming you need ot run on first friday of the month at 12am:
>
> 0   0   1-7   *   5   <insert your command here>
>
> First Friday of month will fall on days 1-7 of a month. (Anyone,
> correct me if I'm wrong).

the above cron entry will always execute at time 00:00 every friday and day
1 to 7 of the month...

cron rules to execute the command is that:

(minute) AND (hour) AND (month of year) AND ( (day of month) OR (day of
week) ) = TRUE

the correct entry should be:

0 0 * * 5 /path/program

where the /path/program execute the intended command if the day of the month
is LESS THAN 7 and not equal or greater than that :->

fooler.

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