topic Re: how to take the present kernel backup in Operating System - HP-UX

how to take the present kernel backup

rajesh73 — Mon, 27 Apr 2015 04:37:24 GMT

How to take the kernel backup in hpux 11.31

P.S. This thread has been moved from General to HP-UX > ignite. - Hp Forum Moderator

Re: how to take the present kernel backup

Bill Hassell — Mon, 27 Apr 2015 16:14:41 GMT

The kernel (vmunix) is automatically backed up whenever a new kernel is built. If you are running 10.20, 11.00 or 11.11, the previous kernel is /stand/vmunix.prev. For 11.23 and 11.31, the previous kernel is in /stand/backup.

When you refer to "kernel", do you mean the HP-UX kernel or do you mean the bootable volume as in vg00?

Re: how to take the present kernel backup

rajesh73 — Tue, 28 Apr 2015 05:06:35 GMT

Thanks for your reply

Could you please explain below message

------>When you refer to "kernel", do you mean the HP-UX kernel or do you mean the bootable volume as in vg00?

Re: how to take the present kernel backup

rajesh73 — Tue, 28 Apr 2015 05:27:50 GMT

One more doubt in your above message you told me,The kernel (vmunix) is automatically backed up whenever a new kernel is built. so if I am installed one depot that time the new kernel will built automatically. Please confirm

Re: how to take the present kernel backup

Bill Hassell — Tue, 28 Apr 2015 12:36:29 GMT

>> kernel backup ... vg00 ...

The kernel file is /stand/vmunix for a normal bootup. If you install a kernel patch or change a kernel parameter using SAM or SMH, then the current vmunix file is moved to /stand/backup (or vmunix.prev for earlier versions of HP-UX) and a new vmunix file is created. If the new kernel does not work, you can select the previous version during an interactive bootup.

The word backup is more often used in reference to a backup to tape or over the network. vg00 is the standard name for the first volume group which contains the HP-UX files as well as a boot area. So the question is: do you want to backup the thousands of files in vg00 or just make a copy of the current vmunix file?

Re: how to take the present kernel backup

GregSB — Tue, 28 Apr 2015 14:11:39 GMT

kconfig -s <config_name> will save the running kernel configuration to the <config_name> specified. This is useful prior to making changes to the running kernel configuration.