topic Re: How to rebuild kernel? in Operating System - HP-UX

How to rebuild kernel?

Teck Sim — Tue, 02 Jul 2002 13:25:56 GMT

I am doing a cold-install of HP-UX 11, and I want to keep the same old kernel parameters after the cold-installation.
How can I rebuild/re-configure back to the same kernel parameters?
I did ftp a copy of /stand/system files to my c drive.
Thanks.

Re: How to rebuild kernel?

Pete Randall — Tue, 02 Jul 2002 13:31:14 GMT

I use the /stand/system file to go through SAM and change all the parameters one by one.

Pete

Re: How to rebuild kernel?

PIYUSH D. PATEL — Tue, 02 Jul 2002 13:36:26 GMT

Hi,

You can make a copy of /stand/system amd /stand /vmunix and then use SAM.

You can also use command line :

Make any kernel parameter changes with 'kmtune':

# kmtune -s = -S /stand/build/system

#cd /stand/build
# /usr/lbin/sysadm/system_prep -s system
( Prepares new system file )
# /usr/sbin/mk_kernel -s system
( Prepares new kernel )
# mv /stand/system /stand/system.prev
( Move old system file )
# mv /stand/vmunix /stand/vmunix.prev
( Move old kernel file )
# mv /stand/dlkm /stand/dlkm.vmunix.prev
# mv /stand/build/system /stand/system
( Move new system file to /stand )
# kmupdate /stand/build/vmunix_test
( Moves new kernel into place )
# shutdown -ry 0

Piyush

Re: How to rebuild kernel?

Martin Johnson — Tue, 02 Jul 2002 13:37:31 GMT

Copy the file back to /stand/system, the run /usr/sbin/mk_kernel. See "man mk_kernel" for more info.

HTH
Marty

Re: How to rebuild kernel?

PIYUSH D. PATEL — Tue, 02 Jul 2002 13:55:18 GMT

Hi,

You can always move the old system.prev and vmunix.prev to the /stand directory as system and vmunix and then reboot the system. You machine will run with the old kernel.

Do this in single user mode :

#cp /stand/vmunix /stand/vmunix.old ( Make copy of new kernel )

#mv /stand/vmunix.prev /stand/vmunix

#cp /stand/system /stand/system.old
#mv /stand/system.prev /stand/system

Piyush

Re: How to rebuild kernel?

James Wang_3 — Wed, 03 Mar 2004 15:20:37 GMT

Hi Mr. Patel,

I found you command line kernel update to be usefule.

I am challenged to write an automation script to rebuild kernel for orcle 9i installation over 4 dozen production lx 3000. My question is:

1. For tunable parameters part, can one just update /stand/system for it to take effect without rebuild the kernel or using kmtune?

2. If kernel must be rebuild, then is it ok for me just to use unix editor to make change over system files? Do I still have to use system_prep -s system.

3. What is the difference between /stand/system and /stand/build/system?

4. What if new kernel built on my automation script don't work but the server was told to reboot. Use cd?

Thanks in advance.