In our network we set host names for machines in the dhcp server.
When I use the live CD in our internal network, however, the host name
assigned to the host (or rather: MAC address) is overriden by "debian".
If I boot with 'nohosts' I merely get 'localhost.localdomain' , as this
is the default /etc/hostname file left there.
I figured that 'debian' is better than nothing. However I would still
prefer to get the hostname.
The hostname is set by the following in /sbin/dhclient-script:
set_hostname() {
local current_hostname=$(hostname)
if [ -z "$current_hostname" -o "$current_hostname" = "(none)" ]; then
hostname "$new_host_name"
fi
}
I figure that the real fix for that may be to conditionally unset
'current_hostname' in a enter hook (only if we got a new hostname).
But for now I use a simple exit hook:
$ cat config/chroot_local-includes/etc/dhcp3/dhclient-exit-hooks.d/hostname
#!/bin/sh
# if we got a new lease with a hostname, set the hostname
if [ "$reason" = 'BOUND' ] && [ "$new_host_name" ]
then
hostname "$new_host_name"
fi
Results will naturally differ if you use a different dhcp client. I
recently tried udhcpc and it was actually functional :-)
Notes on testing this:
If you use qemu / kvm with its usernet, you can tell it to set the
hostname it its built-in dhcp server using something along the lines of:
kvm -net user,hostname=ian -net nic binary.img
In our network we use dnsmasq. Setting a "static" hostname entry there
is straight-forward:
/etc/ethers:
00:11:22:33:44:55:66 ian
/etc/hosts:
192.168.0.130 ian
--
Tzafrir Cohen
icq#16849755 jabber:[email protected]
+972-50-7952406 mailto:[email protected]
http://www.xorcom.com iax:[email protected]/tzafrir
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