Date: Mon, 5 Feb 2001 21:47:14 +0100 From: Cliff Sarginson <cliff@raggedclown.net> To: Joe.Warner@smed.com Cc: lucas@slb.to, freebsd-questions@FreeBSD.ORG Subject: Re: Help me make FreeBSD shine Message-ID: <20010205214713.A1054@raggedclown.net> In-Reply-To: <852569EA.005F58D2.00@Deimos.smed.com>; from Joe.Warner@smed.com on Mon, Feb 05, 2001 at 10:25:14AM -0700 References: <852569EA.005F58D2.00@Deimos.smed.com>
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On Mon, Feb 05, 2001 at 10:25:14AM -0700, Joe.Warner@smed.com wrote:
>
>
> Hey thanks!
>
> Right now, I'm just starting with something simple.
>
> I created this script:
>
> #!/bin/sh
>
> grep -v "#" /etc/hosts | awk '{print $1}' | while read host
> do
> ping -c 1 $host
> done >results
^^^^^^^^
>
>
> ...and it works, except I want the output to be dumped
> into a text file.
>
> Do you know how I should change this script so I could
> do that?
>
> If this script doesn't do what my manager wants, I'll
> definitely try yours.
>
> Thanks
>
> Joe
>
>
>
>
>
>
>
>
> |--------+----------------------->
> | | Lucas Bergman|
> | | <lucas@slb.to|
> | | > |
> | | |
> | | 02/05/01 |
> | | 09:50 AM |
> | | Please |
> | | respond to |
> | | lucas |
> | | |
> |--------+----------------------->
> >---------------------------------------------------------|
> | |
> | To: Joe Warner/SMS@SMS |
> | cc: freebsd-questions@freebsd.org |
> | Subject: Re: Help me make FreeBSD shine |
> >---------------------------------------------------------|
>
>
>
>
>
> > Is there a way that I could write up some simple shell script that
> > would ping the IP addresses of these systems and then log the output
> > into a file that I could make accessible through a web browser? If
> > so, I could set it to run in the CRON scheduler every four hours at
> > specific times/days.
>
> Look at
>
> http://www.slb.to/~lucas/hacks/iplist-1.0.tar.gz
>
> This contains two scripts, iplist.sh and iplist2html.sh. The first
> pings all the IP addresses on an 8-bit IP network and logs when each
> was last heard from (in Unix time format, seconds since midnight on
> 19700101). The second script creates a web page that shows which IP
> addresses are "free" (have not been heard from in greater than some
> number of seconds, by default twenty days). This helps out my old
> employer who refused to use DHCP but who wanted an easy way to assign
> free IP addresses.
>
> The package also contains a trivial C program which prints the current
> time in seconds since the Unix epoch.
>
> I have a cron job that runs `sh /path/to/iplist.sh' every few hours
> and `sh /path/to/iplist2html.sh >/path/to/freeip.html' afterward. I
> would advise *not* running these scripts as root. Also, ideally you
> would run `sh iplist2html.sh >freeip.html.tmp && mv freeip.html.tmp
> freeip.html' so that freeip.html isn't truncated if iplist2html.sh
> bombs in the middle of a run. iplist.sh does not corrupt its data
> file if it crashes.
>
> Hopefully, this is similar enough to what you want to do that it will
> get you started.
>
> Lucas
>
>
>
>
>
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