how to increment a number

[Charles Holland]

This is my script: (not complete yet have to incorporate a do loop and an if count is > 100 to stop

count=0
echo $count
perform some function
(($count = $count + 1))
echo " the new count is "$count

Purpose is to check 100 things and the only thing different is the last diget(s)

It can't be that hard, but it has been a LONG day.

Points awarded promptly.

[Court Campbell]

This may give you a good start

for x in `seq 1 100`
do
echo $x
done

[Court Campbell]

if you post more about what you are trying to accomplish with examples the community would be more than glad to help out.

[Charles Holland]

Court,
Thanks for the reply. Basically we would like a script to go out on our network and see which IP's exist.

Start with 1.2.3.X

Do loop begins here
Ping to see if 1.2.3.X exists >> /tmp/ping_results
test to see if X is = 256
if it is exit
if not increment X + 1 (and remain in loop)
end

Charles

[Court Campbell]

I am all for scripting, but I think an easier solution would be to download angry ip scanner on a windows machine and scan the whole subnet.

http://www.angryziber.com/ipscan/

[Court Campbell]

and you could always use nmap.

# nmap -sP 192.168.10.0/24

[Charles Holland]

With this script and an in_list file containing all the addresses to test it works fine

for I in `cat /root/in_list`
do
echo " Now testing address" $I
ping -c 2 $I >> /tmp/out_list
echo " "
done

I just don't want to create the entire in_list file.

I'll look at the link you provided and eval.

Charles

[Charles Holland]

what is nmap? I have looked on my HPUX boxes, my Linux box and tried it from a command window on my desktop.

[Court Campbell]

You would need to download nmap.

http://insecure.org/nmap/download.html

[Charles Holland]

I have tried the first link you provided. I tried running in from the web site and our AV would not allow it to run. I downloaded the .ZIP file and tried to extract it but the AV rejected it again.

We will look at the nmap product and see what it looks like.