Basic shell script advice needed

[lvds]

Hi,

I need help on writing a simple shell script which tests if internet is up and running or not.
So i could be sure if a user click on an icon he will connect to a webpage or he will receive an error message stating he didn't connect to internet.

May someone help please ?

Many thanks,
Laurent.

[gary101]

how are you connecting to the internet? Through a LAN (network card) , wireless or dialup?

There are lots of ways to go about this but most depend on what type of connection you have.

[lvds]

Hi,

Yes that is the problem: i don't know which network support the user will have. It could be lan or wireless or dialup. first i thought at pinging www.google.com but don't know how to interpret the answer so to tell it is connected or not...

Any help is welcome...

Best regards,
Laurent.

[gary101]

Something along these lines should work if all you want to do is check pings:

#!/bin/sh

HOST=www.google.com
count=2 # Send only two pings.

if [[ `ping -c $count "$HOST"` ]]
then
echo ""$HOST" You ARE connected to internet."
else
echo ""$HOST" You are NOT connected to internet."
fi

[rarsa]

I'd further recommend pinging the server where the page you want to show is, that way you can kill two birds with one stone.

The message could say "You are either not connected to the internet or the page you are trying to access is not accessible at the moment"

[lvds]

Thank you very much, i will work with this !

Best regards,
Laurent