[Ubuntu] Redirect Ping Output?

[JRA]

Hello all, this one's doing me in a bit.

 

Looking to redirect the output of ping command. Knocked up a little line of bash that'll ping a website and, if it can do so, show one message and if not show another:

 

ping -c1 www.crashplan.com && echo "Current connectivity to CrashPlan: OK" || "BACKUP CONNECTIVITY FAILURE - check network cable, lights on network card/s, router and all switching are on and working." | tail -n1

 

But despite the tail it spits out the following:

 

PING www.crashplan.com (216.17.8.19) 56(84) bytes of data.64 bytes from central.crashplan.com (216.17.8.19): icmp_seq=1 ttl=53 time=113 ms


--- www.crashplan.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 113.238/113.238/113.238/0.000 ms
Current connectivity to CrashPlan: OK

 

All I want as output is that final line that indicates success or not (which tail should be doing I'd think.)

 

Anyone know what to do?

 

Thanks for any pointers.

Edited July 6, 2016 by JRA

[Davit2005]

Isn't there a PowerShell for ping is it Test-connection and then do a action on it i.e. email??

[JRA]

Hi - thanks for that. On Ubuntu though. Looks like I didn't tick that Ubuntu box wotsit right.

[Davit2005]

Jus realised this was on ubuntu Edited July 6, 2016 by Davit2005
Reader error

[unixman_again]

Maybe add a -q option to the ping command? (Don't have my Linux box here today, so I can't test it.)

[jinnantonnixx]

Try this. It's a bit more robust and the output is clean.

Supresses StdIO output and tests the result of the ping in a CASE construct. Looks for 100% packet loss and 0% packet loss to determine the result.

 

case `ping -qnc 1 www.crashplan.com 2>&1` in
   *'100% packet loss'*) echo "BACKUP CONNECTIVITY FAILURE - check network cable, lights on network card/s, router and all switching are on and working."
   exit 1
   ;;
   *' 0% packet loss'*) echo "Current connectivity to CrashPlan: OK"
   exit 1
   ;;
   *) echo "Problem with script"    # should never see this.
   ;;
   esac

Edited July 6, 2016 by jinnantonnixx

[JRA]

Thanks everyone! Jinnantonnixx got it, that works beautiful!