Comments on: FQDN – ala Fully Qualified Domain Name http://jkroon.blogs.uls.co.za/it/networking/fqdn-ala-fully-qualified-domain-name Ultimate Linux Solutions Sat, 07 Jan 2012 13:57:16 +0200 hourly 1 http://wordpress.org/?v=3.3.1 By: Jaco Kroon http://jkroon.blogs.uls.co.za/it/networking/fqdn-ala-fully-qualified-domain-name/comment-page-1#comment-132 Jaco Kroon Wed, 05 May 2010 09:01:54 +0000 http://jkroon.blogs.uls.co.za/?p=229#comment-132 well, nsswitch.conf just says how lookups are actually performed, so yes, whilst it's important the defaults are usually OK for most people and unless you're integrating NIS/ldap/mysql/some other lookup technology you shouldn't need to touch it. For reference sake, the defaults (on the systems I've worked on at least) for the "hosts" database is as follows: hosts: files dns This means the name server switch in libc (glibc usually) will first check /etc/hosts and then perform a DNS lookup if looking in /etc/hosts fails. well, nsswitch.conf just says how lookups are actually performed, so yes, whilst it’s important the defaults are usually OK for most people and unless you’re integrating NIS/ldap/mysql/some other lookup technology you shouldn’t need to touch it.

For reference sake, the defaults (on the systems I’ve worked on at least) for the “hosts” database is as follows:

hosts: files dns

This means the name server switch in libc (glibc usually) will first check /etc/hosts and then perform a DNS lookup if looking in /etc/hosts fails.

]]> By: Gert http://jkroon.blogs.uls.co.za/it/networking/fqdn-ala-fully-qualified-domain-name/comment-page-1#comment-131 Gert Wed, 05 May 2010 08:50:54 +0000 http://jkroon.blogs.uls.co.za/?p=229#comment-131 /etc/nsswitch.conf is also important, at least if DNS was not set up on the box previously... Linux uses /lib/libnss_*.so.* as resolvers, while Solaris uses /usr/lib/nss_*.so.1 as resolvers /etc/nsswitch.conf is also important, at least if DNS was not set up on the box previously…

Linux uses /lib/libnss_*.so.* as resolvers, while Solaris uses /usr/lib/nss_*.so.1 as resolvers

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