Shell Programming and Scripting

how can you ping a domain and store the ip?
like given a url in a variable $url
how can i ping it?

also how can i find the local server's ip address on a cpanel server?
(i have multiple servers and didnt want to hard code it in)

(basically i want to check the domain accounts on the server, ping them and see if they are resolving to the local server ip)

Please post your exact Operating System and version and state what Shell you prefer.
There is so much variation in TCP/IP commands that there is no generic answer.

There seems to be a Forum on the cPanel site:
http://www.cpanel.net/

centos
and my shell is like this:

#!/bin/bash

thanks!

---------- Post updated at 10:35 PM ---------- Previous update was at 02:37 PM ----------

given any domain domain.com
do you know how to ping the domain to get its ip from a shell script?
thanks

Not tested

Code:

 
a="www.google.com"
ip=$(host $a | awk '/has add/ {print $4;exit}')
[ "$ip" -eq "" ] && echo "Not Valid Domain" || echo "IP address is : $ip"

Something like this?

Code:

val=$( ping $url -c 1 )
IP=$(echo $c | awk -F'[()]' '{print $6}')

If ping succeeded, the IP will have the ip address.

If your OS is solaris, then this will not work!

HTH
--ahamed

host doesnt give the right ip of google

for example, Google is 74.125.227.49 (from a ping)

but
host google.com says:
google.com has address 173.194.34.52
google.com has address 173.194.34.48
google.com has address 173.194.34.49
google.com has address 173.194.34.50
google.com has address 173.194.34.51
google.com mail is handled by 30 alt2.aspmx.l.google.com.
google.com mail is handled by 40 alt3.aspmx.l.google.com.
google.com mail is handled by 50 alt4.aspmx.l.google.com.
google.com mail is handled by 10 aspmx.l.google.com.
google.com mail is handled by 20 alt1.aspmx.l.google.com.

---------- Post updated at 05:08 AM ---------- Previous update was at 05:01 AM ----------



what's val?

the ping gives somethign like this:
ping "google.com" -c 1

how do you extract the ip from that?

PING google.com (173.194.34.48) 56(84) bytes of data.
64 bytes from par03s03-in-f16.1e100.net (173.194.34.48): icmp_seq=1 ttl=57 time=4.31 ms

--- google.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 4.314/4.314/4.314/0.000 ms


what if the url times out

like

ping nonexistentdomaifsffdsdfsdsfn.com
ping: unknown host nonexistentdomaifsffdsdfsdsfn.com

---------- Post updated at 05:10 AM ---------- Previous update was at 05:08 AM ----------

is the code like this?
val=$( ping $domain -c 1 )
IP=$(echo $val | awk -F'[()]' '{print $6}')

Yes... sorry about the typo...

Code:

val=$( ping $domain -c 1 )
IP=$(echo $val | awk -F'[()]' '{print $6}')

--ahamed