topic Re: Setting Kernel Parameters in Operating System - HP-UX

Setting Kernel Parameters

karthik_4 — Tue, 11 Sep 2001 09:38:57 GMT

Can anybody tell me whats the filename where you set the kernel parameters like

nfile , NPROC MAXUSERS,NPTY,NSTRPTY,NSTRTEL etc..

I am not using any GUI for setting these parameters.Can anybody tell me where i will get the file.

Thanks

Re: Setting Kernel Parameters

Christopher McCray_1 — Tue, 11 Sep 2001 09:45:25 GMT

/stand/system file you use, but then you have to manually rebuild a kernel and reboot. SAM has both the GUI and text-based gui available and auto-detects this when it starts up. Then you can go into Kernel Configuration --> Configurable Parameters, where you can pind the parameters you want to modify and let sam rebuild your kernel for you. Hope this helps.

Regards,
Chris

Re: Setting Kernel Parameters

Stefan Farrelly — Tue, 11 Sep 2001 09:46:48 GMT

They should all be in the file /stand/system

If not you can use this command to create it, then edit it and change it, then build a new kernel;
/usr/lbin/sysadm/system_prep -s /stand/system

Re: Setting Kernel Parameters

Wodisch — Tue, 11 Sep 2001 09:47:17 GMT

Hello,

the file is "/stand/system" but that will not help you,
as you will need the commands to generate the new
kernel from them...

To modify you should use the command "kmtune" and
if you "search" for this keayword, you should be able
to find quite a few threads about "how to generate a
kernel from command line"...

HTH,
Wodisch

Re: Setting Kernel Parameters

eran maor — Tue, 11 Sep 2001 09:48:02 GMT

Hi

you need to put all the value in the /stand/system file and recompile the kernel .

# cd /stand/build
# /usr/lbin/sysadm/system_prep -s system
# vi system (make your changes)
save file

# /usr/sbin/mk_kernel -s system
# /usr/sbin/kmupdate

Re: Setting Kernel Parameters

Rita C Workman — Tue, 11 Sep 2001 11:12:34 GMT

Everyone has told how to build a kernel manually...

But just in case...you don't have to use a gui to run SAM (System Administration Menu). It will come up in character mode as well; and in SAM you can modify the kernel configuration and have SAM rebuild the kernel for you.

I apologize if this answer is too basic....but the more I re-read your question....I wondered why you didn't mention using SAM to change your parms...

Just a thought,
Rita

Re: Setting Kernel Parameters

someone_4 — Tue, 11 Sep 2001 15:03:49 GMT

Hello
I did this yesterday here is a doc I got from HP.. And here is a website that was much helpfull.
http://forums.itrc.hp.com/cm/components/FileAttachment/0,1167,0xa5915220af9bd5118ff10090279cd0f9,00.htm

Richard

Re: Setting Kernel Parameters

Andrew R. — Tue, 11 Sep 2001 23:50:44 GMT

My friend, There is two ways to do that, the first one is using SAM (that is straigh forward),second way is to do this:
#cd /stand/build
#system_prep -s system
#vi system (add your changes)

#mk_kernel -s ./system (build the new kernel)

#mv /stand/system /stand/system.old
#mv /stand/vmunix /stand/vmunix.old

#cp /stand/build/system /stand
#cp /stand/build/vmunix_test /stand/vmunix

Reboot
shutdown -r now

#sysdef (verify the changes)

Good Luck !!

Re: Setting Kernel Parameters

Michael Tully — Wed, 12 Sep 2001 03:48:31 GMT

Hi,

You can this in SAM using a character based terminal if you wish or you use the command line as follows:

You didn't mention what OS version you are running?

If using 10.20 these are the command line options:

# cd /stand/build
# /usr/lbin/sysadm/system_prep -s system
# vi system (make your changes)
save the file
# /usr/sbin/mk_kernel -s system (this builds the new kernel)

# mv /stand/vmunix /stand/vmunix.120701
# cp /stand/build/vmunix_test /stand/vmunix

Reboot your system.

If using 11.00 these are the command line options:

# cd /stand/build
# /usr/lbin/sysadm/system_prep -s system
# vi system (make your changes)
save file
# /usr/sbin/mk_kernel -s system (this build the new kernel)
# /usr/sbin/kmupdate

# cd /

Reboot your system.

HTH
-Michael