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Old 03-20-2013, 05:02 AM   #1
rushikeshgaradade
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how to check whether DNS is configured on my os(CentOS)


how to check whether DNS is configured on my os(CentOS)

or is it by default configured on intallation

if not configured then how to configure it..

and also for Reverse DNS....

Last edited by rushikeshgaradade; 03-20-2013 at 05:08 AM.
 
Old 03-20-2013, 05:32 AM   #2
acid_kewpie
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what does that mean? As a client or as a server?
 
Old 03-20-2013, 05:48 AM   #3
rushikeshgaradade
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for server......

Actually i am trying to install HDP in that there is one step saying "All hosts in your system must be configured for DNS and Reverse DNS."

i just want to resolve above query
 
Old 03-20-2013, 05:55 AM   #4
acid_kewpie
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So I guess you don't know what that means then.

I would read that any client in this solution (no idea what HDP is btw.) Will need to be able to resolve appropriate names in the solution to IP addresses and also be able to convert IP's back to hostnames. This could be from local /etc/hosts file entries, or from a dedicated DNS server such as BIND

btw, you might want to say please or thank you next time.
 
Old 03-20-2013, 06:29 AM   #5
shivaa
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Can you check following file on your system. Are there name servers' defined in it or not?

Code:
~$ cat /etc/resolv.conf
 
Old 03-20-2013, 06:37 AM   #6
rushikeshgaradade
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Sorry for that.....


HDP stands for Hortonworks Data Platform....

please tell me how to check or configure DNS
 
Old 03-20-2013, 06:46 AM   #7
rushikeshgaradade
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@shivaa:

No name servers defined........

this is info displayed........

No nameservers found; try putting DNS servers into your
# ifcfg files in /etc/sysconfig/network-scripts like so:
#
# DNS1=xxx.xxx.xxx.xxx
# DNS2=xxx.xxx.xxx.xxx
# DOMAIN=lab.foo.com bar.foo.com
 
Old 03-20-2013, 06:55 AM   #8
shivaa
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File should look like this, where 2 DNS servers are defined as primary and secondary:
Code:
domain mars.universe.com
nameserver x.x.x.x
nameserver x.x.x.x
search mars.universe.com universe.com
So define them first or ask your network admin to provide you the same.
 
  


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