Date: Mon, 5 Feb 2001 10:25:14 -0700 From: Joe.Warner@smed.com To: lucas@slb.to Cc: freebsd-questions@freebsd.org Subject: Re: Help me make FreeBSD shine Message-ID: <852569EA.005F58D2.00@Deimos.smed.com>
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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
...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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