topic Re: Reinstalling OS in Operating System - HP-UX

Reinstalling OS

Nicky_5 — Wed, 02 Mar 2005 14:43:18 GMT

Hi,

I have an HP machine which we are not using. It has OS 11.11.
Since i am new to HP, i want to try re-installing the OS on this machine. My comapny has allowed me to do so, provided i give them a machine thats well set up. Once i have reinstalled the OS they will start using this machine as a development machine.

My questions is how to reinstall the OS if i have all the OS cds?
I need the machine to have the same ip address and all other configurations as it is having now, so what are the files i need to keep a copy of?
Also What all info will the installation process ask me for that i need to keep ready at hand.

all inputs appreciated.

Re: Reinstalling OS

Nobody's Hero — Wed, 02 Mar 2005 14:46:59 GMT

copy /etc/rc.config.d/netconf file
/etc/resolv.conf
/etc/nsswitch.conf

All for networking.

I'd put them to tape so you can restore it.
ftp'ing to another box wont work because your network will be down until you get the correct ip address...

Re: Reinstalling OS

Biswajit Tripathy — Wed, 02 Mar 2005 14:52:28 GMT

For network configurations, you need following
files:

1) /etc/rc.config.d/netconf (for IP address / router
address).

2) /etc/resolv.conf (for name server address)

I can only think of these two files. See if someone
suggests something I can't recall right now.

The installation process will ask you IP address and
router info only. Unless you are sure what you are
doing, take the default values for filesystem sizes
and everything else.

- Biswajit

Re: Reinstalling OS

HGN — Wed, 02 Mar 2005 14:53:02 GMT

Hi

Before you start loading make a note of

the filesytsem layout(if you want to keep it same)
Network parameters
/etc/hosts
/etc/nsswitch.conf
/etc/resolv.conf
/etc/rc.config.d/netconf

#swlist -l bundle (to know what products are there on the system)

The above files can be copied over to another server.

Network parameters and filesystem layout would be required for the install and also the primary swap space(run swapinfo -at)

Rgds

HGN

Re: Reinstalling OS

Nicky_5 — Wed, 02 Mar 2005 14:53:46 GMT

Hi,

Thankyou for your reply,
Was i installing a new machine, where would i get all this info from?
i basically want to install this machine as if i was installing a new machine and get it up and running.

I will defiantely take a backup on tape of all the files i have currently in there, just for the rainy day.

But assuming i was installing a new machine, waht all do i need to take care of? what info do i need ready at hand?

Re: Reinstalling OS

Biswajit Tripathy — Wed, 02 Mar 2005 14:57:11 GMT

Nicky wrote:
> But assuming i was installing a new machine, waht all
> do i need to take care of? what info do i need ready
> at hand?

You need just the IP address, hostname and gateway
(router) address. Nothing else. These parameters
should be in the files I (and others) mentioned in last
few posts. Just write down these values on a piece of
paper and enter when the installation process asks
you.

- Biswajit

Re: Reinstalling OS

Nicky_5 — Wed, 02 Mar 2005 15:10:30 GMT

Hi,

Thankyou, thats very helpful.
Can you also give me one more bit of info.

How do i get my machine to boot form CD?
if i just insert a bootable cd and reboot my machine will it boot form cd automatically? or do i have to change my boot list?

Re: Reinstalling OS

Nobody's Hero — Wed, 02 Mar 2005 15:25:23 GMT

INsert/mount cd
interrupt the boos sequence when it tells you you can.
type 'sea' to search for bootable devices
type 'bo' and the P number associated with the device and it will boot from cd.

Re: Reinstalling OS

RAC_1 — Wed, 02 Mar 2005 15:25:38 GMT

Put in the Os install CD, and do shutdown -ry 0

When system is booting interrupt the boot process. On PDC menu, do se ipl. It should show the cdrom/dvd rom device.

Then do bo p1 (assuming that p1 is boot device-cdrom/dvd)

From then on it is self explainatory.

Anil

Re: Reinstalling OS

Jim Butler — Wed, 02 Mar 2005 16:37:25 GMT

Make sure you have all the codewords for licensed software.
there is a .codeword hidden file in /var/adm/sw/.codewords

you can make an ignite image of the machine and save it to a remote, trusted disk if you have it

make_sys_image is the command (do a man on it)

Re: Reinstalling OS

Nicky_5 — Wed, 02 Mar 2005 16:45:40 GMT

Hi All,

Thanks for all your inputs. It was really helpful. I have taken a backup of the machine as well as kept copies of the specified files. I am waiting for the CD rom to arrive.

I also wanted to know how i could do the installation through ignite. I will create another post for that.

Thank you all...