LinuxQuestions.org
Latest LQ Deal: Complete CCNA, CCNP & Red Hat Certification Training Bundle
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 07-02-2012, 04:59 AM   #1
ravi_nandula
Member
 
Registered: Sep 2011
Posts: 81

Rep: Reputation: Disabled
Script to find the IP from hostname


Hi everyone,

I know that if we give "ping hostname" will give the IP address.
This is good if I have 5 to 6 hosts.If I have hundreds of hosts ping cmd is very painful to do.

So I need script to find all those IP address......Can anyone help me out with this.

Thanks and advance
 
Old 07-02-2012, 05:16 AM   #2
lithos
Senior Member
 
Registered: Jan 2010
Location: SI : 45.9531, 15.4894
Distribution: CentOS, OpenNA/Trustix, testing desktop openSuse 12.1 /Cinnamon/KDE4.8
Posts: 1,144

Rep: Reputation: 217Reputation: 217Reputation: 217
HI,

do you have maybe a file with a list of hostnames ?

It would be quickly done like this:
Code:
# vim hostnames_file.txt
google.com
linuxquestions.org
yahoo.com
microsoft.com
then you will "loop" through that file with a script
Code:
vim test-hostnames.sh
#!/bin/bash
while read line; do
#    echo "$line"
   ping -c 1 "$line"
done < "$1"
and you will run it as:
Code:
# ./test-hostnames.sh hostnames_file.txt
ING google.com (209.85.148.113) 56(84) bytes of data.
64 bytes from fra07s07-in-f113.1e100.net (209.85.148.113): icmp_seq=1 ttl=54 time=30.1 ms

--- google.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 30.184/30.184/30.184/0.000 ms
PING linuxquestions.org (75.126.162.205) 56(84) bytes of data.
64 bytes from www.linuxquestions.org (75.126.162.205): icmp_seq=1 ttl=46 time=162 ms

--- linuxquestions.org ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 162.975/162.975/162.975/0.000 ms
PING yahoo.com (209.191.122.70) 56(84) bytes of data.
64 bytes from ir1.fp.vip.mud.yahoo.com (209.191.122.70): icmp_seq=1 ttl=45 time=153 ms

--- yahoo.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 153.648/153.648/153.648/0.000 ms
PING microsoft.com (64.4.11.37) 56(84) bytes of data.


--- microsoft.com ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms
good luck
 
Old 07-02-2012, 05:25 AM   #3
rosehosting.com
Member
 
Registered: Jun 2012
Location: Missouri, USA
Posts: 222

Rep: Reputation: 62
another way of doing this is as the following:

Code:
# while read domain; do host -t A $domain; done < /tmp/hostnames
google.com has address 74.125.225.33
google.com has address 74.125.225.40
google.com has address 74.125.225.41
google.com has address 74.125.225.38
google.com has address 74.125.225.35
google.com has address 74.125.225.36
google.com has address 74.125.225.32
google.com has address 74.125.225.37
google.com has address 74.125.225.39
google.com has address 74.125.225.46
google.com has address 74.125.225.34
linuxquestions.org has address 75.126.162.205
yahoo.com has address 209.191.122.70
yahoo.com has address 72.30.38.140
yahoo.com has address 98.139.183.24
microsoft.com has address 64.4.11.37
microsoft.com has address 65.55.58.201
 
Old 07-02-2012, 11:16 PM   #4
jefro
Moderator
 
Registered: Mar 2008
Posts: 16,356

Rep: Reputation: 2377Reputation: 2377Reputation: 2377Reputation: 2377Reputation: 2377Reputation: 2377Reputation: 2377Reputation: 2377Reputation: 2377Reputation: 2377Reputation: 2377
Ping may or may not resolve a hostname. It may not be possible to query a secure system to access it's hostname.
 
Old 07-03-2012, 02:12 AM   #5
lithos
Senior Member
 
Registered: Jan 2010
Location: SI : 45.9531, 15.4894
Distribution: CentOS, OpenNA/Trustix, testing desktop openSuse 12.1 /Cinnamon/KDE4.8
Posts: 1,144

Rep: Reputation: 217Reputation: 217Reputation: 217
^^^ totally agree,
nslookup or dig might be better.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
How to find out where is the HOSTNAME defined? thomas2004ch Linux - Software 9 03-28-2011 07:19 AM
Luci Can't Find Hostname worldgnat Linux - Networking 0 06-14-2007 09:09 PM
Postfix can't find hostname shipon_97 Linux - Networking 3 09-18-2006 07:26 AM
Can't find hostname for a given IP KoppelC Linux - Networking 4 08-02-2005 09:57 AM
gnome can't find the ip for my hostname mandrakemikael Linux - Newbie 1 09-25-2004 04:09 AM


All times are GMT -5. The time now is 12:13 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration