2010/12/26 S Mathias <smathias1...@yahoo.com>: > $ true && true || echo hi > $ true && false || echo hi > hi > $ false && true || echo hi > hi > $ false && false || echo hi > hi Hi I was trying with this logic of the internet connection checker script. If $ true && true || echo hi <<< All right
if $ true && false || echo hi or $ false && true || echo hi or $ false && false || echo hi <<<< the connection is broken This my implementation of the checker script: ping -W 1 -c 4 google.com && ping -W 1 -c 4 yahoo.com || echo "The connection is broken" This when the Internet connection is broken: cedua...@madmax:~/workspace/ngl/Debug$ ping -W 1 -c 4 google.com && ping -W 1 -c 4 yahoo.com || echo "broken" ping: unknown host google.com broken cedua...@madmax:~/workspace/ngl/Debug$ ping -W 1 -c 4 google.com && ping -W 1 -c 4 yahoo.com || echo "broken" ping: unknown host google.com broken cedua...@madmax:~/workspace/ngl/Debug$ ping -W 1 -c 4 google.com && ping -W 1 -c 4 yahoo.com || echo "broken" ping: unknown host google.com broken cedua...@madmax:~/workspace/ngl/Debug$ ping -W 1 -c 4 google.com && ping -W 1 -c 4 yahoo.com || echo "broken" ping: unknown host google.com broken This when the Internet connection are right cedua...@madmax:~/workspace/ngl/Debug$ ping -W 1 -c 4 google.com && ping -W 1 -c 4 yahoo.com || echo "broken" PING google.com (74.125.65.104) 56(84) bytes of data. 64 bytes from gx-in-f104.1e100.net (74.125.65.104): icmp_req=1 ttl=55 time=91.0 ms 64 bytes from gx-in-f104.1e100.net (74.125.65.104): icmp_req=2 ttl=55 time=81.5 ms 64 bytes from gx-in-f104.1e100.net (74.125.65.104): icmp_req=3 ttl=55 time=85.8 ms 64 bytes from gx-in-f104.1e100.net (74.125.65.104): icmp_req=4 ttl=55 time=80.0 ms --- google.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3004ms rtt min/avg/max/mdev = 80.048/84.627/91.077/4.303 ms PING yahoo.com (72.30.2.43) 56(84) bytes of data. 64 bytes from ir1.fp.vip.sk1.yahoo.com (72.30.2.43): icmp_req=1 ttl=53 time=151 ms 64 bytes from ir1.fp.vip.sk1.yahoo.com (72.30.2.43): icmp_req=2 ttl=53 time=148 ms 64 bytes from ir1.fp.vip.sk1.yahoo.com (72.30.2.43): icmp_req=3 ttl=53 time=145 ms 64 bytes from ir1.fp.vip.sk1.yahoo.com (72.30.2.43): icmp_req=4 ttl=53 time=140 ms --- yahoo.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3001ms rtt min/avg/max/mdev = 140.337/146.438/151.636/4.140 ms > $ ping -W 1 -c 4 google.com >& /dev/null | grep -q "100% packet loss" && ping > -W 1 -c 4 www.yahoo.com >& /dev/null | grep -q "100% packet loss" || echo "no > internet connection" > no internet connection > $ > ping -W 1 -c 4 google.com >& /dev/null | grep "100% packet loss" > $ > ping -W 1 -c 4 www.yahoo.com >& /dev/null | grep "100% packet loss" > $ > > > > ...both sides "false", because they have no output, because google.com and > www.yahoo.com is reachable. > how come it writes "no internet connection"? [at the longest line] > i just want a "oneliner" that checks if theres "internet connection" or no. :\ > > where did i screw up? 8) > > > > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > Archive: http://lists.debian.org/471466.28989...@web121403.mail.ne1.yahoo.com > > -- ceduard0 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/aanlktimow1s5wmkyyol6is-zvf443ddls1xvkkews...@mail.gmail.com
