Very Computer

Hi all,

Someone told me I have to use /dev/null.  What is the syntax?

Cron below:
10 1 * * * /usr/local/bin/somescript

Thanks
Electron

Quote:> Cron below:
> 10 1 * * * /usr/local/bin/somescript

Try:

10 1 * * * /usr/local/bin/somescript > /dev/null 2>&1

-Chuck

       -------------+-------------------+-----------------------------------
       I believe that what I'm feeling changes how the world appears.  -Rush

/usr/local/bin/somescript >/dev/null

which sends the job's standard output to /dev/null, which discards it.

This output might also go to standard error, in which case use (may
depend on your shell)

/usr/local/bin/somescript >&/dev/null

which directs both stdout and stderr to /dev/null.

--

Nate Eldredge

10 1 * * * /usr/local/bin/somescript >/dev/null 2>$1

Mark

--
Mark Hargrave  <><

Web:   http://www.markhargrave.com
"Depart from evil and do good; seek peace and pursue it" (Psalm 34:14)

10 1 * * * /usr/local/bin/somescript > /dev/null 2>&1

redirect STDOUT and STDERR to /dev/null.

regards
roy

Thank you all.

-- Electron

Quote:>This output might also go to standard error, in which case use (may
>depend on your shell)

No, it doesn't depend on your shell, cron always uses /bin/sh.

Quote:>/usr/local/bin/somescript >&/dev/null

>which directs both stdout and stderr to /dev/null.

See all the other responses for the correct syntax to redirect stderr.

--

Genuity, Burlington, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.

That's all the other responses except the one where there's a typo ("$"
instead of "&" )

:-)

--
Tony

If your cron job fails, don't you want to know about it so you can fix
whatever caused it to fail?

Hi Mathew,

Thanks for asking.  Most of the time I do but not on this one.  It is
an ftp script running every 10 minutes.

Thanks
--Alex

On Thu, 22 Mar 2001 07:24:29 -0500, Mathew Kirsch

Hi Electron,
I don't understand - someone told you to use /dev/null
but they couldn't tell you the syntax? Could you explain
that anomaly please? Anyway...

10 1 * * * /usr/local/bin/somescript > /dev/null 2>&1

will redirect all output (including error messages)
to the "file" /dev/null. This, of-course, means that
you will not see any output from your cron job - but
then again, that's what you asked for!

Perhaps the following "man" pages would be appropriate:

sh
crontab

Good Luck,
Avi.