[mrtg] Re: Need help when running script in crontab (found cause of problem)
Ershad Shafi Chowdhury
iru at bol-online.com
Mon Aug 2 12:42:46 MEST 1999
found the following from deja in response to someone else with a similar
Telnet was never designed to be used this way. Use NetCat:
make install clean
(and replace "telnet" with "nc" in your script).
If you really want to know, what makes a difference here when running from
cron vs by hand is that in cron telnet would not be attached to a tty and
would close the connection before data is received.
Hope this helps, --Stanislav
So i guess this means I need to go get netcat :-) Cheers everyone ...!
----- Original Message -----
From: Ershad Shafi Chowdhury <iru at bol-online.com>
To: <mrtg at list.ee.ethz.ch>
Sent: Monday, August 02, 1999 2:39 PM
Subject: [mrtg] Need help when running script in crontab
> hi! I have script that calculates the total number of users online and
> redirects output to four lines with no problems. But the same script, when
> run from crontab returns a value of "zero". basically the script looks
> this :
> telnet hostname 987 | grep user | wc -l > filename
> The output from "telnet" from cron is
> Connected to maia.bol-online.com.
> Escape character is '^]'.
> Connection closed by foreign host.
> with all the stuff inbetween missing, so obviously "grep" can't find any
> "user" and "wc" counts zero lines!
> I figured someone else here must have faced a similar problem. Any
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