topic Re: regarding system file in Operating System - HP-UX

regarding system file

Tvs — Fri, 19 Aug 2005 03:16:01 GMT

iam new to hp-ux . pls help me to find what is the function of /stand/system file. if it got deleted whether the system will boot..? is it using for setting kernel parameters ( like /etc/system in solaris) .

on the time of booting , when the system checking the /stand/system file ..? and if it is required to boot the system properly, is it possible to point to a null file ( solaris it is possible to boot the system with a null file instead of /etc/system file)

Re: regarding system file

Borislav Perkov — Fri, 19 Aug 2005 03:43:21 GMT

Hi,
/stand/system is default HP-UX system description file and it is not the same as /etc/sytem in Solaris, which is system specification file. For that reason you can't make kernel reconfiguration like in Solaris.
/stand/system file holds the system-specific kernel tunable parameters. Under HP-UX 11i, the changes of kernel parameters are stored in "Kernel Registry Service". The KRS maintains data files under /stand/krs, so if the kernel is rebuild from the system file, any changes stored in KRS will be lost. KRS files are binary files and they can't be printed directly ore dumped using string.
Regards,
Borislav

Re: regarding system file

melvyn burnard — Fri, 19 Aug 2005 03:49:49 GMT

The /stand/system file is a text file that allows you to configure the kernel by adding/removing drivers, modifying parameters for tuning etc.
If you lose this file, the system still boots and works ok. However, when you come to look at modifying the kernel you need this.
If it has been deleted/corrupted, you can either recover from a backup, or recreate it using /usr/lbin/sysadm/system_prep.

For example

/usr/lbin/sysadm/system_prep -v -k /stand/vmunix -s /stand/mysystemfile

This reads in from the kernel file /stand/vmunix and creates a text system file named /stand/mysystemfile

Re: regarding system file

morganelan — Fri, 19 Aug 2005 04:37:20 GMT

I think from mk_kernel command (load a kernel configuration from a system file), this command is used as follow:
#/usr/sbin/mk_kernel [-o path_name] [-s system_file] [-v]

-o path_name Specify the target kernel path.
-s system_file Specify the HP-UX system description file. If this option is not specified, the system file /stand/system is used.
-v Verbose mode. (Has no effect; retained for backward compatibility.)

So i think we can use our own system description file other that /stand/system if we have the other configuration file.

Re: regarding system file

Tvs — Fri, 19 Aug 2005 07:16:52 GMT

thanks for your valuable comments