Shell Programming and Scripting

Hmm.. the bash script is not working..
But this one is usefull, thanks for that!

Code:

IP=192.168.1.5 SUBNET=${IP%.*} echo $SUBNET 192.168.1

And now the second part: the below script will ping the given ip adress:

Code:

echo "Enter IP-addres:"
read host1
ping -c 1 $host1

How can I ping from $host to $host2 in the below script??

Code:

echo "Enter beginning IP-addres:"
read host1
echo "Enter ending IP-addres:"
read host2
ping -c 1 $host1 [..] $host2

Something else then [..] must be filled in, so I can ping from beginnin ip (something like 192.168.1.1) till ending ip (something like 192.168.1.100)

The seq command may come in handy.

Code:

N=100
for n in $(seq 1 $N); do
    echo Do something with $n
done

Only if netmask is 255.255.255.0 (24 bits)

What in the above script will change when it is 255.255.254.0?

And if I run the above script I get the next error:

Code:

unix1: line 7: ((: .100: syntax error: operand expected (error token is ".100")

Thanks frans, I think we are in the right direction.

I think you're missing a dot.

Code:

netId1=${host1#$SUBNET.}
netId2=${host2#$SUBNET.}

OMG
I'll correct the original post.
Thanks

Many thanks for this one...
The above script is working! I can ping from beginning to ending IP-adresses very fast!

Lets go to the second part...
When no beginning and ending IP is given, so when the fields are empty.
The script must ping my own subnet!
This is the subnet where the system is logged in. So if I am in 192.168.100.* segmet it must ping from 192.168.100.1 to 192.168.100.255..

How can we accomplish this?

---------- Post updated at 08:35 AM ---------- Previous update was at 08:32 AM ----------

Or... the second part can be done like:

ping -b x.x.x.255

the tripple x must be filled in my the script by grepping my ip and pasting it there.