> > btw, if I need to check if the network is up in a script, I usually do > > ping -q -c1 -w4 some.remote.host >/dev/null 2>&1 && > command-to-run-if-remote-host-reachable > > It the advantage that it checks directly connection to the host > you wish to connect to, so it also won't run the command if your network > is up, but the remote host is inaccessible... > > If your server doesn't respond to pings, just use some other server > (eg google's public dns 8.8.8.8) >
Or you could use hping, which has the advantage that it tests the actual service you want to use, rather than just the host it sits on; sphinx adam # hping2 -c 1 -S -p 80 www.google.com >/dev/null 2>&1 && echo "it worked" it worked
