Simple...ish ping script.

hypercondor · 05-08-2008, 03:21 AM

Ok i am making a script that will ping all active computers on the network and then output the the IP and hostnames to the screen.
So far i have

Code:

#!/bin/sh
echo
echo Machines responding on Network Address:  192.168.1.0
ping -b -c4 192.168.1.0 | grep "icmp_seq=1" | cut -f4 -d' ' | cut -f1 -d:
echo

My problem is that i cant think of a way to get rid of the

Code:

WARNING: pinging broadcast address

message, any help would be grateful

Tinkster · 05-08-2008, 04:39 AM

Code:

#!/bin/sh
echo
echo Machines responding on Network Address:  192.168.1.0
ping -b -c4 192.168.1.0 2>/dev/null| grep "icmp_seq=1" | cut -f4 -d' ' | cut -f1 -d:
echo

Do you actually get responses? My switch would stop
that kind of non-sense ;}

Cheers,
Tink

thronh · 05-08-2008, 02:23 PM

You could always use nmap for your ping list. It takes a bit longer, but it gets rid of the warning.

nmap -sP 192.168.1.0-255 |sed '1,2 d'

viron · 05-08-2008, 04:56 PM

Quote:

Originally Posted by hypercondor

Ok i am making a script that will ping all active computers on the network and then output the the IP and hostnames to the screen.
So far i have

Code:

#!/bin/sh
echo
echo Machines responding on Network Address:  192.168.1.0
ping -b -c4 192.168.1.0 | grep "icmp_seq=1" | cut -f4 -d' ' | cut -f1 -d:
echo

My problem is that i cant think of a way to get rid of the

Code:

WARNING: pinging broadcast address

message, any help would be grateful

Try the following:

ping -b -c4 192.168.1.0 | grep "icmp_seq=1" | cut -f4 -d' ' | cut -f1 -d: | sed -e 's/WARNING: pinging broadcast address//g'

ncsuapex · 05-08-2008, 05:20 PM

^ add | sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4

to sort the IP by order.

hypercondor · 05-08-2008, 11:08 PM

Thanks for the replys guys, I worked it out on my own in the end. i ended up scrapping the ping and using nmap as it made it alot easier to display the hostname.

Quote:

#!/bin/sh
echo
echo Machines responding on Network Address: 192.168.200.0
nmap -sP 192.168.200.* | grep ".esf" | cut -f2,3 -d' '
echo

Basically it was a code that i would use when i ssh to my linux lab at uni so i could see which machines were up and running.

oh and Tink

Quote:

Originally Posted by Tinkster

Code:

#!/bin/sh
echo
echo Machines responding on Network Address:  192.168.1.0
ping -b -c4 192.168.1.0 2>/dev/null| grep "icmp_seq=1" | cut -f4 -d' ' | cut -f1 -d:
echo

Do you actually get responses? My switch would stop
that kind of non-sense ;}

Cheers,
Tink

No i dont get responses at my house as my switch also blocks out broadcast pings, but the uni lab doesnt.