[lug] Scripting question

[Paul Nowosielski]

Dear All,

Thank you all for your suggestions. I will implement and let you know  
how it goes.

Happy holiday and thank you,

kind regards,

Paul

On 12/21/12 7:45 PM, Jeffrey S. Haemer wrote:
> What Lee said.  Bash even lets me say it like this:
>
>   cmd &>> /var/tmp/logfile.txt
>
> but cron uses /bin/sh by default.
>
> I've made enough "Heck. That's only in bash" mistakes in cron that I 
> start my crontabs as described here:
>
> http://seejeffrun.blogspot.com/search?q=crontab
>
> which also says how I avoid losing cron's mail: I let Google store it 
> for me. :-)
>
>
> On Thu, Dec 20, 2012 at 10:41 PM, Lee Woodworth 
> <blug-mail at duboulder.com <mailto:blug-mail at duboulder.com>> wrote:
>
>     On 12/20/12 21:03, Jed S. Baer wrote:
>     > On Fri, 21 Dec 2012 10:04:21 +0700
>     > Paul Nowosielski wrote:
>     >
>     >> Here is the commands I am running and the script I call:
>     >>
>     >> /bin/date >> /root/scripts/bandwTest; /root/scripts/bandwidth.sh >>
>     >> /root/scripts/bandwTest;
>     >
>     > As Davide pointed out, you're likely missing the PATH. Easiest
>     thing to
>     > do is invoke iptables as /sbin/iptables (or whatever the full
>     path is).
>     >
>     > Another question would be where is STDERR going? Off the top of
>     > my head, I don't remember how cron handles that. Capturing it would
>     > likely show you what's wrong. I often redirect it in the script
>     itself,
>     > but there are other ways to do it too. So my rendition of your
>     script
>     > would look like:
>     >
>     > #!/bin/bash
>     > exec >> /root/scripts/bandwTest 2>>&1
>
>     Don't know if that will work, but this does work for me:
>
>     # cmd >>/var/tmp/logfile.txt 2>&1
>
>     The order of the redirections matters, the logic is approximately:
>     1) redirect fd 1 to /var/tmp/logfile.txt in append mode,
>     2) redirect fd 2 to a duplicate of fd 1 (thus inheriting the
>     append mode).
>
>     Jeff H. probably knows the more rigorous description of what this
>     does.
>
>     > echo
>     > echo "Bandwith out:"
>     > /sbin/iptables -L -v |grep OUTPUT |awk '{print $7}'
>     >
>     > However, I've never tried that using the concat style
>     redirection, so I
>     > don't know for sure it'll work. Usually, I do:
>     >
>     > exec > foo.log 2>&1
>     >
>     > And that's just from memory; consulting the exec manpage would
>     be a good
>     > thing.
>     >
>     > And if you have no luck with this, might be good to see your crontab
>     > entry.
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>
>
>
> -- 
> Jeffrey Haemer <jeffrey.haemer at gmail.com 
> <mailto:jeffrey.haemer at gmail.com>>
> 720-837-8908 [cell], http://seejeffrun.blogspot.com [blog],
> http://www.youtube.com/user/goyishekop [vlog]
> /????????? ??? ??? ????? ????? ??????./
>
>
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