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Old 09-09-2010, 04:33 AM   #1
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Question Hostname to Hostname mapping within /etc/hosts possible?

Hi All,

I'm 99.9999% sure I know the answer to this already, but just wanted to check no-one knew of an ingenious way to do this anyway..

Changing etc/hosts file in order to have a hostname map to a hostname ... rather like a cname I suppose.

Why?!? you ask.. well

I basically have some long DNS names that are configured in several place on a server but all of them point to the same IP address. I wondered to make sys admin easier if it was possible I create an entry such as

long_dns_name short_name

and then configure all these different places to use the shortname, just so if the DNS of the long name changes its easy to change that DNS entry... as i have no control over the DNS name?

Is it possible without installing any form of local DNS server?

Thanks all,
Old 09-09-2010, 04:39 AM   #2
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According to the hosts man page:
IP_address canonical_hostname [aliases...]

Zero, one or more aliases can exist in an /etc/hosts entry. The first entry is the IP address.
Old 09-09-2010, 06:43 AM   #3
Registered: Aug 2006
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Thats what i thought, thanks for the reply. I cannot use that because I cannot set the IP address up, i'm literally just wanting to be able to use a DNS name that I can put into all configuration files of different software/packages installed, so that in the event of IP/Hostname change, I could just change the one place... etc hosts and everything else will still be configured to use the short hostname so i wouldn't need to go and change all of those places as well.


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