[K12OSN] bash script help

[Doug Simpson]

Is it just not possible to make a bash script run in a continuous loop? Your solution looks to be about the easiest to do, but, like the rest, has no provision for the "restart at the top of the list again" part. No one has offered a solution that includes that. . .

In your solution, would I need the text to log in quotes if it were more than one word so it wouldn't think it was more than one variable?

like:
10.40.12.3 "This hostname is down."

And, will it not report anything if the host is *not* down? For the purpose, I need it to sit there quietly running until it sees that a host is actually down before it takes any action. Then it reports, and continues on to the next one and so on. 

What does this line do?:
  done </path/to/file

Thanks for your assistance!

Doug

Doug Simpson
Technology Specialist
De Queen Public Schools
De Queen, AR
simpsond at leopards.k12.ar.us

>>> Les Mikesell <les at futuresource.com> 10/30/2007 1:04 PM >>>
Doug Simpson wrote:

> I have a script that I am trying to get to work and I can't get it right. It is a script that will write the names of offline servers to a textfile.
> 
> As it is, it only does the first server and repeats, *unless* the first server is not online, in which it writes to the file and then goes on to the next one.
> How can I make it continue through the script regardless of whether or not each server is online, but still echo the text to the file if it finds one offline and then restart at the top of the list again?
> 
> The script follows.
> 
> ******************************************
> #!/bin/bash
> while (true)
> do
> #sleep 30
> if ping -i 3 -c 3 10.40.12.56
> then
> continue
> else
> echo "Doug's workstation is offline. Please check it!" >>serverdown.txt
> fi

[..lots of repeated stuff...]


I'd make a text file in the form:

ip_address <white space> text to log

And use a script like:

#!/bin/bash
while :
  sleep 30
  do
  while read ADD TEXT
  ping -i 3 -c 3 $ADD || echo $TEXT >>serverdown.txt
  done </path/to/file
done

-- 
   Les Mikesell
    lesmikesell at gmail.com 

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