Re: Problem with DHCP, /etc/hosts and GNOME

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Keven Ring wrote:
William Hooper wrote:

Satish Balay said:



Ah.. I interptered it as - an option to dhcp-clinet (not server) to
ignore what dhcp server says - and use the provided value as the
hostname. Perhpas there should be some other option for this
functionality? (RFE)

I don't like hostname changing (when you move laptop between networks)
- this changes xauth which messes up everything else..


A quick browse through the networking scripts suggests that the hostname
will only change if it is "localhost". I haven't looked too hard though. I know that I don't have a problem with my laptop, which I set the
hostname on during install (but that was with RHL 9 and an upgrade to
FC1). It may be more of a case of the DHCP servers I'm using not trying
to change the hostname, though.





It's in the /etc/sysconfig/network-scripts/network-functions script. There is a function called need_hostname().

Returns 0 if the current hostname is "localhost", "localhost.localdomain" or "(none)". Returns 1 otherwise. This function is called in the /etc/sysconfig/network-scripts/ifup script. However, again, just like everything else, just because the DHCP client *requests* a hostname, does not mean that the DHCP server is obliged to hand one back...

And you're not "obligated" to accept it. You can set

	supersede host-name "your-host-name"

in your /etc/dhclient/dhclient.conf file to override whatever the DHCP
server gives you.  see "dhclient.conf(5)" and "dhcp-options(5)" for
info.
----------------------------------------------------------------------
- Rick Stevens, Senior Systems Engineer     rstevens@xxxxxxxxxxxxxxx -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-    If your broker is so damned smart...why is he still working?    -
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