topic Re: Recover /usr/lib in Operating System - HP-UX

Recover /usr/lib

shanmugt — Thu, 24 Mar 2011 06:16:06 GMT

I have accidentally renamed /usr/lib as /usr/lib_orig in a HP UX server.
Now, no commands are getting executed in the server.
Is there any way to recover those files again and start normal execution.

Re: Recover /usr/lib

Horia Chirculescu — Thu, 24 Mar 2011 07:42:07 GMT

Hello,

You must boot the install CD which has a recovery mode.

Best regards
Horia.

Re: Recover /usr/lib

shanmugt — Thu, 24 Mar 2011 07:59:12 GMT

Hello,
Its not possible anymore to login to the machine.Even console login under root does not work.

Will it be possible to logon ( with root )still with the install DVD on recovery mode.The machine is isolated now completely.

Thanks.

Re: Recover /usr/lib

Horia Chirculescu — Thu, 24 Mar 2011 08:04:42 GMT

>Its not possible anymore to login to the machine.Even console login under root does not work.

Of course this is the normal behavior on the current circumstances. Anything using a library that has to be found under /usr/lib would not work anymore.

This is why you need to use a recovery media or just use ignite backups if available.

Best regards,
Horia.

Re: Recover /usr/lib

shanmugt — Thu, 24 Mar 2011 08:31:17 GMT

Hello ,
Thanks.Is there any document that I could refer to do the recovery.
Regards.

Re: Recover /usr/lib

Horia Chirculescu — Thu, 24 Mar 2011 08:38:29 GMT

Ignite-UX Administration Guide:

http://docs.hp.com/en/B2355-90772/B2355-90772.pdf

Best regards,
Horia.

Re: Recover /usr/lib

Horia Chirculescu — Thu, 24 Mar 2011 08:47:32 GMT

Also, check

Using recovery mode from the installation CD:

http://docs.hp.com/en/B2355-90153/ch06s04.html

Best regards
Horia.

Re: Recover /usr/lib

Matti_Kurkela — Thu, 24 Mar 2011 09:22:24 GMT

You can boot the system to single user mode even without /usr, so it might not be necessary to boot to recovery mode from an installation CD.

Once you get to the single user root prompt, run these commands:
mountall
/sbin/mv -i /usr/lib_orig /usr/lib

When /usr/lib is renamed, most commands in /usr/bin and /usr/sbin stop working, because they depend on libraries located in /usr/lib.

But commands located in /sbin don't depend on /usr at all.

MK

Re: Recover /usr/lib

shanmugt — Fri, 25 Mar 2011 06:20:12 GMT

Hello,
What is the procedure to login via single user mode and will be still possible to login as root?
It is not possible to get the root prompt via console.

Regards

Re: Recover /usr/lib

shanmugt — Fri, 25 Mar 2011 10:21:14 GMT

Thanks MK. It is now working.

Re: Recover /usr/lib

shanmugt — Fri, 25 Mar 2011 10:22:45 GMT

Thanks MK. It is now working

Re: Recover /usr/lib

Dennis Handly — Fri, 25 Mar 2011 22:44:57 GMT

Next time if you try dangerous commands you may want to have multiple root shells logged in so you can use the tools in /sbin to recover.