host command options

ZAMO · 07-05-2007, 12:55 AM

Will any one tell me the option to find out the CNAME of a domain?
i can find out the MX of a domain using
host -tMX domain.com?
How can i find out the CNAME using host command?

Nylex · 07-05-2007, 02:13 AM

The same way?!

host -tCNAME domain.

You could also use dig.

acid_kewpie · 07-05-2007, 02:16 AM

no, you don't ask for the CNAME record from a name server. i guess that the equivalent use of asking for the CNAME's would be to ask which other domains are CNAME's to the A record, which you can't, and wouldn't do. A CNAME is a stepping stone to an A record. maybe some context on what you wish to acheive by this...?

ZAMO · 07-05-2007, 03:14 AM

"host -tCNAME domain" It did not work.
Chris,
Thank you for your feed. But i can't understand what you wrote. Please repeat it with a lower version of English.(Sorry, my mother tongue is not English, and am learning).

acid_kewpie · 07-05-2007, 03:17 AM

ok, no problem... just go from this angle... why do you want to do this? what problem are you trying to fix?

ZAMO · 07-05-2007, 03:34 AM

oh..ho.
I am just asking for knowledge. Actually today my friend (who is a website reseller) ask me this. He is having his own DNS for his sites, but for mail he is using google servers as MX.so he asked me to check it. When i came across one by one...
host -tNS domain
host -tMX domain
host -tCNAME domain .....???/?

SO this is the story. Nothing more in it...

acid_kewpie · 07-05-2007, 03:42 AM

well its' the wrong kind of record. the way you are asking doesn't make sense. you DO want to know what the MX record is for a site, but you DON'T want to know what the CNAME's associated with it are. it's not useful information in itself.

ZAMO · 07-05-2007, 03:56 AM

Yes i have less knowledge on CNAME records..
Ok.. chris will you please tell me the way to find out the CNAME by some other commands too, other than host. I just want to learn it.

Sorry , if i didn't understand what you say?

acid_kewpie · 07-05-2007, 04:16 AM

well you just don't find out the cname. you can find out that the DNS entry you are querying IS a CNAME, but you don't ask google.com what it's CNAME's are in the same way you'd ask what it's MX records are. it's not like that.

ZAMO · 07-05-2007, 04:29 AM

You mean i must not query like this
"host -tNS domain
host -tMX domain
host -tCNAME domain .....???/?"
CNAME is entirely different from NS,MX????(IS it like that?)

acid_kewpie · 07-05-2007, 04:34 AM

you CAN do that, but it doesn't really tell you anything useful. the fact that a dns domain name is a CNAME is not "interesting", but MX and NS records are extremely important and work in very different ways.

ZAMO · 07-05-2007, 04:43 AM

Thank you ., chris

please · 12-30-2008, 02:00 AM

Hi

how to add interface option in host command?

If can`t ,what command is good ?
I have 2 NICs so I want to know which eth was used host command

Thanks

acid_kewpie · 12-30-2008, 02:04 AM

don't drag up dead threads. new question = new thread.