[ale] crontab

[Brandon Wood]

This doesn't address the specific question but it is related:

This seems like a good place to point out the following bit I keep in my
cron file. The comments that trace down to the columns has always been very
useful to me. I didn't come up with this and I'm sorry to say I don't
remember where I saw it first.

Also another thing I would suggest in terms of cron maintenance is editing
text file (I call mine cronjobs.txt) and when you want to update your cron
jobs you run: "contab -r && crontab ./cronjobs.txt" . crontab -r will clear
out your jobs and crontab ./file.txt will load your new jobs. It's been
handy to me have that setup for backups. YMMV

(word-wrap may be your enemy below)
==================
# Global variables
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=woody at 2143.net
HOME=/home/bwood

#  minute (0-59),
#  |     hour (0-23),
#  |     |       day of the month (1-31),
#  |     |       |       month of the year (1-12),
#  |     |       |       |       day of the week (0-6 with 0=Sunday).
#  |     |       |       |       |       commands
#  |     |       |       |       |       |
   0 *       *      *       *       /home/bwood/script.sh


On Thu, Apr 23, 2009 at 5:42 PM, Pete Hardie <pete.hardie at gmail.com> wrote:

> On Thu, Apr 23, 2009 at 13:33, Chris Fowler <cfowler at outpostsentinel.com>
> wrote:
> > I want to execute a script at 6pm on the first Thursday of each month.
> > Is there a trick in crontab I can do?
> >
> > Here are the fields allowed
> >
> >              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)
> >
> > The only thing I can think of off the top of my head is to run it every
> > Thursday and then check to see if we are the first Thursday of the
> > month. If not, exit 0.
>
> That looks like the only option - the only mention I found in GNU crontab
> was
> that day-of-month and day-of-week will BOTH be run if specified
>
>
>
> --
> Pete Hardie
> --------
> Better Living Through Bitmaps
>
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>
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