topic Re: NIS master and clients process and files owner by root in Operating System - HP-UX

NIS master and clients process and files owner by root

gcsg — Thu, 13 Dec 2012 00:15:28 GMT

Hi,

I have a NIS Master server and several Clients of it and I realize that all the processes and files that should be owne by root appears owne by 0 (the number that actually is root into the /etc/passwd).

I already check the /etc/passwd and also the NIS passwd for any incorrect entry of the number 0 user and nothing is wrong.

this is an example of it

daemon 1971 1 0 Oct 20 ? 0:00 grmd

0 1706 1704 0 Oct 20 ? 0:00 /usr/sbin/nfsd 4

0 1708 1704 0 Oct 20 ? 0:00 /usr/sbin/nfsd 4

0 1709 1706 0 Oct 20 ? 0:00 /usr/sbin/nfsd 4

Any idea?

regards,

Re: NIS master and clients process and files owner by root

Dennis Handly — Thu, 13 Dec 2012 06:40:56 GMT

>all the processes and files that should be owned by root appears owned by 0

What does your last few lines of /etc/passwd look like?

Something like:

+::-2:-2:::

Re: NIS master and clients process and files owner by root

gcsg — Thu, 13 Dec 2012 15:55:26 GMT

Actually not, there are a few users ID and everything

x1234:Hz64S/eM59BcE:117:76:Users name:/tmp/x1234:/sbin/sh
y1234:I5D0wl/A4IRLE:118:1604:Users name:/home/y1234:/sbin/sh
z1234:8FSLDRqdQJnrA:130:4506:Users name:/home/z1234:/sbin/sh

Regards,

Re: NIS master and clients process and files owner by root

Patrick Wallek — Thu, 13 Dec 2012 16:08:35 GMT

What are the permissions on /etc/passwd? Is it readable by everyone? It should be rw-r--r-- for permissions.

Re: NIS master and clients process and files owner by root

gcsg — Thu, 13 Dec 2012 16:13:19 GMT

I added the +::-2:-2::: to the /etc/passwd and stop the nis.client and nis.server. Once I started the nis.server everything looks fine onwer root. but when I started nis.client again is the owner 0

Re: NIS master and clients process and files owner by root

gcsg — Thu, 13 Dec 2012 16:21:49 GMT

NIS Master server

-r--r--r-- 1 0 other 2025 Dec 13 08:58 /etc/passwd

Re: NIS master and clients process and files owner by root

Dennis Handly — Thu, 13 Dec 2012 22:56:40 GMT

>NIS Master server

How about the permissions on passwd on the NIS clients?

Re: NIS master and clients process and files owner by root

gcsg — Thu, 13 Dec 2012 23:12:07 GMT

-r--r--r-- 1 0 sys 2865 Dec 13 09:08 /etc/passwd

I made a couple of tests, and the owner change when I started nis.master

Re: NIS master and clients process and files owner by root

gcsg — Fri, 14 Dec 2012 15:26:59 GMT

I looks that it was a problem with the 2nd line on the /etc/passwd on the master. It was deleted and everything came back to root

root:FxuOpg9A:0:3::/:/sbin/sh
droot:R6TEgWb7FU:0:3::/:/sbin/sh ---- line deleted

thanks

Re: NIS master and clients process and files owner by root

Matti_Kurkela — Sun, 16 Dec 2012 07:23:40 GMT

Do you have an /etc/nsswitch.conf file? If you have such a file, what does it say in the "passwd:" line?

I haven't worked too much with NIS, but I was under the impression that the +/- syntax like "+::-2:-2:::" would require having the passwd source specified as "compat" in nsswitch.conf.

The behaviour of your system sounds like you might have nsswitch.conf settings like:

passwd: nis [NOTFOUND=return] files

This would use /etc/passwd if nis.client is stopped, but when nis.client is running successfully, it would use NIS information only. If the requested data was not found in the NIS, a failure would be returned even though /etc/passwd might contain valid data.

Run "ypcat passwd | grep '^root:'" if there is no output, then the NIS data does not include the root account. With a nsswitch.conf settings like above, that would explain why things seem to break for root as soon as the nis.client is started.