Re: ****Re: ****Re: ****OT?: Now mysteriously have a hostname defined

On Mon, Mar 31, 2008 at 7:55 AM, Craig White <craigwhite@xxxxxxxxxxx> wrote:

On Mon, 2008-03-31 at 06:31 +0800, Fennix wrote:
On Mon, Mar 31, 2008 at 6:15 AM, Craig White <craigwhite@xxxxxxxxxxx>
wrote:
On Mon, 2008-03-31 at 05:56 +0800, Fennix wrote:
> On Mon, Mar 31, 2008 at 5:55 AM, Fennix
<cn.stefan@xxxxxxxxx> wrote:
> [root@bogon log]# cat /etc/sysconfig/network
> NETWORKING=yes
> HOSTNAME=localhost.localdomain
> [root@bogon log]#
>
>
> On Mon, Mar 31, 2008 at 5:50 AM, Craig White
> <craigwhite@xxxxxxxxxxx> wrote:
> On Mon, 2008-03-31 at 05:44 +0800, Fennix
wrote:
> > I noticed today in my terminal window I
now have a
> host name of
> > "bogon". I had never set a hostname for
my Fedora8
> home system. I
> > can see from my logwatch and cron system
mails that
> the delivery to
> > this host name started March 25th but none
of my
> mails shows anything
> > that seems relevant to what has set this
hostname.
> Oddly on the 26th
> > the system mails were addresses again to
> localhost.localdomain but
> > again reverted on the 27th to being
addresses to
> bogon. I have
> > checked the man pages on the hostname
command to
> locate where the name
> > is defined. Have checked the
> >
files /etc/host, /etc/hosts.conf, /etc/hostname
> (does not
> > exist), /etc/nsswitch.conf, ... but this
name does
> not show in any of
> > the files I have looked at so far. Any
ideas where
> to look further?
> > I am now wondering whether my system has
been
> compromised somehow...
> > Googleing the word bogon shows me the
meaning of of
> bogon which does
> > not seem helpful in this case.
> >
> > Checking /var/log/messages-20080330 shows
the use of
> this hostname
> > with a reboot I had done on the 24th.
Still cannot
> see where or how
> > this was set.
> ----
> what is output of?
>
> cat /etc/sysconfig/network
>
> Craig
>
> Ooops....
>
>
> [root@bogon log]# cat /etc/sysconfig/network
> NETWORKING=yes
> HOSTNAME=localhost.localdomain
----
sounds as if the name is attached to either:
- NetworkManager and since I don't use it, I don't know where
it might
store supplemental settings...
- the configuration of the device itself
- in some script that sets the name somewhere.

is this system using DHCP to get its ip address?
if so, what is ouput of...
/etc/dhclient-eth0.conf

I think that if the hostname is 'reset', it should be
reflected in
syslog...
what is output of...
grep Host /var/log/messages

Might it be set in /etc/rc.d/rc.local?
tail /etc/rc.d/rc.local # should look very much like this and
anything
# additional might be a script that
sets it
#!/bin/sh
#
# This script will be executed *after* all the other init
scripts.
# You can put your own initialization stuff in here if you
don't
# want to do the full Sys V style init stuff.

touch /var/lock/subsys/local

Craig

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Hi Craig,

Yes this pc does get its address using DHCP but the
file /etc/dhclient-eth0.conf does not exist in etc. The only file
name starting with dhcp is dhcpd.conf and the contents appear to be a
generic sample.

The output from /var/log/messages is as follows:

[root@bogon log]# grep Host /var/log/messages-20080323
Mar 17 13:05:07 localhost kernel: ehci_hcd 0000:00:1d.7: EHCI Host
Controller
Mar 17 13:05:07 localhost kernel: USB Universal Host Controller
Interface driver v3.0
Mar 17 13:05:07 localhost kernel: uhci_hcd 0000:00:1d.0: UHCI Host
Controller
Mar 17 13:05:07 localhost kernel: uhci_hcd 0000:00:1d.1: UHCI Host
Controller
Mar 17 13:05:07 localhost kernel: uhci_hcd 0000:00:1d.2: UHCI Host
Controller
Mar 17 13:05:07 localhost kernel: uhci_hcd 0000:00:1d.3: UHCI Host
Controller
Mar 17 13:05:13 localhost avahi-daemon[2362]: Server startup complete.
Host name is linux.local. Local service cookie is 2257381510.
Mar 19 02:13:53 localhost kernel: ehci_hcd 0000:00:1d.7: EHCI Host
Controller
Mar 19 02:13:53 localhost kernel: USB Universal Host Controller
Interface driver v3.0
Mar 19 02:13:53 localhost kernel: uhci_hcd 0000:00:1d.0: UHCI Host
Controller
Mar 19 02:13:53 localhost kernel: uhci_hcd 0000:00:1d.1: UHCI Host
Controller
Mar 19 02:13:53 localhost kernel: uhci_hcd 0000:00:1d.2: UHCI Host
Controller
Mar 19 02:13:53 localhost kernel: uhci_hcd 0000:00:1d.3: UHCI Host
Controller
Mar 19 02:13:59 localhost avahi-daemon[2362]: Server startup complete.
Host name is linux.local. Local service cookie is 1223127342.
[root@bogon log]# grep Host /var/log/messages-20080330
Mar 24 04:52:18 bogon kernel: ehci_hcd 0000:00:1d.7: EHCI Host
Controller
Mar 24 04:52:18 bogon kernel: USB Universal Host Controller Interface
driver v3.0
Mar 24 04:52:18 bogon kernel: uhci_hcd 0000:00:1d.0: UHCI Host
Controller
Mar 24 04:52:18 bogon kernel: uhci_hcd 0000:00:1d.1: UHCI Host
Controller
Mar 24 04:52:18 bogon kernel: uhci_hcd 0000:00:1d.2: UHCI Host
Controller
Mar 24 04:52:18 bogon kernel: uhci_hcd 0000:00:1d.3: UHCI Host
Controller
Mar 24 04:52:24 bogon avahi-daemon[2398]: Server startup complete.
Host name is bogon.local. Local service cookie is 3193077034.
Mar 26 01:25:32 localhost kernel: ehci_hcd 0000:00:1d.7: EHCI Host
Controller
Mar 26 01:25:32 localhost kernel: USB Universal Host Controller
Interface driver v3.0
Mar 26 01:25:32 localhost kernel: uhci_hcd 0000:00:1d.0: UHCI Host
Controller
Mar 26 01:25:32 localhost kernel: uhci_hcd 0000:00:1d.1: UHCI Host
Controller
Mar 26 01:25:32 localhost kernel: uhci_hcd 0000:00:1d.2: UHCI Host
Controller
Mar 26 01:25:32 localhost kernel: uhci_hcd 0000:00:1d.3: UHCI Host
Controller
Mar 26 01:25:36 localhost avahi-daemon[2319]: Server startup complete.
Host name is linux.local. Local service cookie is 1396103600.
Mar 27 13:35:16 bogon kernel: ehci_hcd 0000:00:1d.7: EHCI Host
Controller
Mar 27 13:35:16 bogon kernel: USB Universal Host Controller Interface
driver v3.0
Mar 27 13:35:16 bogon kernel: uhci_hcd 0000:00:1d.0: UHCI Host
Controller
Mar 27 13:35:16 bogon kernel: uhci_hcd 0000:00:1d.1: UHCI Host
Controller
Mar 27 13:35:16 bogon kernel: uhci_hcd 0000:00:1d.2: UHCI Host
Controller
Mar 27 13:35:16 bogon kernel: uhci_hcd 0000:00:1d.3: UHCI Host
Controller
Mar 27 13:35:22 bogon avahi-daemon[2381]: Server startup complete.
Host name is bogon.local. Local service cookie is 2714176635.
[root@bogon log]# grep Host /var/log/messages
Mar 31 04:32:20 bogon kernel: ehci_hcd 0000:00:1d.7: EHCI Host
Controller
Mar 31 04:32:20 bogon kernel: USB Universal Host Controller Interface
driver v3.0
Mar 31 04:32:20 bogon kernel: uhci_hcd 0000:00:1d.0: UHCI Host
Controller
Mar 31 04:32:20 bogon kernel: uhci_hcd 0000:00:1d.1: UHCI Host
Controller
Mar 31 04:32:20 bogon kernel: uhci_hcd 0000:00:1d.2: UHCI Host
Controller
Mar 31 04:32:20 bogon kernel: uhci_hcd 0000:00:1d.3: UHCI Host
Controller
Mar 31 04:32:25 bogon avahi-daemon[2339]: Server startup complete.
Host name is bogon.local. Local service cookie is 4272874820.

Running tail /etc/rc.d/rc.local gives me identical results to your
sample.

Thank you very much for your suggestions. Not clear on the meaning of
the output from messages....The host name should not be derived from
the computer hardware/firmware.
----
I'm thinking that the name must be coming from your dhcp server or from
the config file for the network adaptor...

what is output of?
grep HOST /etc/sysconfig/network-scripts/ifcfg-eth0

what is providing DHCP to this system?

Craig

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Hi Craig,

Still have not determined the cause of the hostname becoming set. My
suspicion now is that it might be DHCP. I have now reset the hostname by
setting up the /etc/hostname file then running "hostname -F /etc/hostname".
I wish I could have determined the cause of this but if what I have done is
permanent then I will live with that.
Thank you again for your help.

Fennix

PS: Thank you to kalinux as well for your suggestion. The avahi daemon was
running so I have stopped that service (since it definitely is unnecessary)
but after rebooting I still did have the bogon hostname for my system. I
have overridden the name using the hostname command and making a hostname
file.
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