topic Re: hostname changes to unknown after installing hardware patch and reboot in Operating System - HP-UX

hostname changes to unknown after installing hardware patch and reboot

Rajesh R_2 — Thu, 07 Apr 2005 23:36:53 GMT

I had installed the Hardware patch bundle HWE1100_B.11.00.0403.3.depot on my HP-UX

11.0 Server and rebooted the machine. After rebooting i found that the system

hostname has changed to unknown. I checked the /var/adm/sw/swagentd.log file and it

is giving a warning as follows:

An attempt to get the network host entry for "unknown" failed.
This may result in denial of access to users and agents at
this host. Check the spelling of this name, then your
"/etc/hosts" file, or your "/etc/resolv.conf" file and DNS
resolver configuration. The nslookup program may be helpful
in isolating this problem.

Even my inetd daemon has not started after rebooting. I had to start it manually.

Kindly help me in resolving this problem.

Thanks & Regards
Rajesh

Re: hostname changes to unknown after installing hardware patch and reboot

T G Manikandan — Thu, 07 Apr 2005 23:42:07 GMT

I would suggest you to do a

#set_parms initial

and do a reboot.

Re: hostname changes to unknown after installing hardware patch and reboot

T G Manikandan — Thu, 07 Apr 2005 23:50:25 GMT

Hey!

Before you do a set_parms initial.

please do the following

1.check your /etc/rc.log and see which all services have failed.

Might be there are some errors are /etc/rc.config.d scripts.

Make sure that you have no copies/revisions of file in the /etc/rc.config.d directories.

There might be multiple versions of netconf file at /etc/rc.config.d directory which is causing the prob..

Re: hostname changes to unknown after installing hardware patch and reboot

Rajesh R_2 — Fri, 08 Apr 2005 00:12:58 GMT

I am hereby uploading the rc.log file. It gives some syntax errors while starting certain serveices.

Re: hostname changes to unknown after installing hardware patch and reboot

Devender Khatana — Fri, 08 Apr 2005 00:21:24 GMT

Hi,
Hostname script itself is giving syntax error. please see this script. I think it was edited earlier, it normally do not happen because of a patch. Still did you confirmed by booting before applying pathces? You can rectify this problem yourself . Compare this files lines no.1 for some syntax errors and have a look at /sbin/init.d/template to have general idea of syntax of these files.

HTH,
Devender

Re: hostname changes to unknown after installing hardware patch and reboot

T G Manikandan — Fri, 08 Apr 2005 00:25:17 GMT

Just check whether any user scripts are present in the /etc/rc.config.d directory

Re: hostname changes to unknown after installing hardware patch and reboot

Devender Khatana — Fri, 08 Apr 2005 00:42:02 GMT

Hi Rajesh,

Just edit the files "/sbin/rc1.d/S320hostname, /sbin/rc1.d/S112kminit' and see the first line should be "#!/sbin/sh" and for files hostname and kminit in /sbin/init.d directory also it should be "#!/sbin/sh".

HTH,
Devender

Re: hostname changes to unknown after installing hardware patch and reboot

Rajesh R_2 — Fri, 08 Apr 2005 01:05:31 GMT

Hi,

I checked the scripts as suggested by devender. The first line is as you told '#!/sbin/sh'.

Manikandan, I also checked the /etc/rc.config.d/ , there are no user scripts.

Re: hostname changes to unknown after installing hardware patch and reboot

Devender Khatana — Fri, 08 Apr 2005 01:12:29 GMT

Hi Rajesh,

Which and all patches does your installation included? Can you uninstall it once and check if it works fine? Did you rebooted prior to pathch installation? It might have happened that problem actually happened earlier and came into effect on reboot.
Just a thought.

HTH,
Devender

Re: hostname changes to unknown after installing hardware patch and reboot

T G Manikandan — Fri, 08 Apr 2005 01:35:31 GMT

Can you please execute

sh -x /sbin/rc1.d/S320hostname

and check exactly what the problem is ...

Re: hostname changes to unknown after installing hardware patch and reboot

Rajesh R_2 — Fri, 08 Apr 2005 02:08:21 GMT

Hai,

Manikandan when I execute
/sbin/rc1.d/S320hostname start

I get the following error

/sbin/rc1.d/S320hostname[36]: Syntax error at line 1 : `(' is not expected.

Re: hostname changes to unknown after installing hardware patch and reboot

T G Manikandan — Fri, 08 Apr 2005 02:20:32 GMT

Do a

$set -x
$/sbin/rc1.d/S320hostname start

Re: hostname changes to unknown after installing hardware patch and reboot

Devender Khatana — Fri, 08 Apr 2005 02:22:08 GMT

Rajesh,

Backup your /sbin/init.d/hostname to hostname.bak and just copy attached file in /sbin/rc1.d directory.

It should look like.

-r-xr-xr-x 1 bin bin 908 Nov 14 2000 hostname

and /sbin/rc1.d/S320hostname should be also link to this file.

And try above step i.e. starting it manually.

HTH,
Devender

Re: hostname changes to unknown after installing hardware patch and reboot

Rajesh R_2 — Fri, 08 Apr 2005 02:22:43 GMT

Manikandan i did as u suggested. It gives the same error.

+ /sbin/rc1.d/S320hostname start
/sbin/rc1.d/S320hostname[36]: Syntax error at line 1 : `(' is not expected.

Re: hostname changes to unknown after installing hardware patch and reboot

T G Manikandan — Fri, 08 Apr 2005 02:25:05 GMT

I am not at my office now.

Can you check the line 36 as where this script is calling

"S320hostname[36]"

Re: hostname changes to unknown after installing hardware patch and reboot

T G Manikandan — Fri, 08 Apr 2005 02:33:13 GMT

Hi Rajesh,

The problem is with your /etc/rc.config.d - hostname initialization file

check your netconf file there.

Check anything junk is present on the 1st line.

Also do not have any netconf.old or netconf.bk files in there.There should be only one file with name "netconf"

Re: hostname changes to unknown after installing hardware patch and reboot

Devender Khatana — Fri, 08 Apr 2005 02:39:12 GMT

Hi,

It is checking /etc/rc.config at line 36. So check the file /etc/rc.config for problems. The contents should like the attached file.

HTH,
Devender

Re: hostname changes to unknown after installing hardware patch and reboot

T G Manikandan — Fri, 08 Apr 2005 02:42:58 GMT

Do check any user scripts are present with hostname entries

#grep HOSTNAME /etc/rc.config.d/

Also,check as what the parameter HOSTNAME=
is set to /etc/rc.config.d/netconf file

Re: hostname changes to unknown after installing hardware patch and reboot

Stephen Keane — Fri, 08 Apr 2005 03:37:46 GMT

Do

# set -x
# . /etc/rc.config 2>&1 | tee foo.log

and post the result of foo.log

Also check that /sbin/rc1.d/S320hostname line 36 does say

. /etc/rc.config

and NOT

. /etc/config

Because . /etc/config WILL give you the error you are seeing.

Re: hostname changes to unknown after installing hardware patch and reboot

Rajesh R_2 — Fri, 08 Apr 2005 04:29:47 GMT

Devender the 36th line contains . /etc/rc.config

Also I compared /etc/rc.config with the file you sent. Both are the same.

Manikandan grep HOSTNAME /etc/rc.config.d/ shows nothing.
The parameter HOSTNAME=hptst

stepen the output of

# . /etc/rc.config 2>&1 | tee foo.log
sh: Syntax error: `(' is not expected.

Thanks & Regards
Rajesh