RE: Help with date and redhat 9

["Sina Bahram" <sbahram@nc.rr.com>]

Thanks so much, that's what I needed to know.

I appreciate it.

Take care,
Sina

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-----Original Message-----
From: speakup-admin@braille.uwo.ca [mailto:speakup-admin@braille.uwo.ca]
On Behalf Of Chuck Hallenbeck
Sent: Sunday, October 26, 2003 7:38 PM
To: speakup@braille.uwo.ca
Subject: RE: Help with date and redhat 9


Okay, here is how to do crontab...

First, make sure your favorite editor is specified in an environment
variable called "EDITOR" and also in one called "VISUAL". When you run
crontab with the -e option it will invoke one or the other of those, I
forget which! I use "ed" in mine, but you might prefer another editor.

So now become root and do this:

crontab -e

Now you are your favorite editor, and you create a one line entry
consisting of five time specifiers and one command, all on one line. The
time specifiers are separated from each other by a space and might be an
asterisk. They are as follows:

specifier #1 is the minute, from 0 to 59.

specifier #2 is the hour, from 0 to 23

specifier #3 is the day of the month, from 1 to 31

specifier #4 is the month, from 1 to 12

specifier #5 is the day of the week, and I forget if this is 0 to 6 or 1
to 7.

So to execute a command say at half past seven every morning, you would
make the line look like this:

30 7 * * * the-command-goes-here

Be sure the 30 starts in column 1!

So what you must do is decide what time each day you want your command
to run, and make a line like the example. If 7:30 AM is not convenient,
pick another time and use the specifiers to say when.

It is a good idea to redirect output from your command to /dev/null,
otherwise you get email to root! Also, you have to supply the full path
to your command, since no path is in effect during the crontab
execution.

When you have done all that, just save your work and exit, and the rest
is automatic.


Hope this helps.

Chuck




-- 
The Moon is Waxing Crescent (3% of Full)
 Get my public key from website, http://www.mhonline.net/~chuckh


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