NIS login discrepancy Post: 35014

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Top Forums UNIX for Dummies Questions & Answers NIS login discrepancy Post 35014 by Henrik on Tuesday 25th of March 2003 11:42:32 AM

03-25-2003

Registered User

NIS login discrepancy

I have a query in relation to a couple of machines I have set up. We will call them machine SUN and HPUX and they are running those operating systems respectively. The SUN machine is acting as an NIS server and the HPUX machine as an NIS client. Now the HPUX machine also has a an auto mounted file system from a 3rd machine (call it 3SYS). The system of accounts and home directories which have been set up on this is curious. The NIS accounts which have been set up have the home directories located in several places. Some accounts have the home directory located on the NIS server itself ( i.e. on SUN) some have the home directories located on the mounted files system of HPUX ( i.e. on 3SYS). This leads to some fun depending where you log in from and this is where this query is going.

As all of these accounts are NIS accounts the password files will be pushed to all machines which are clients slaves or masters. IN all the cases below I have logged onto the machine in question as root and then tried to su - to an account so when I say log on I really mean su - account.

If you log on to the SUN ( the NIS server) with an account which has a home directory on SUN everything works fine as expected. However if you log onto SUN using an account which has its home directory on SYS3 I get an error message saying "NO directory !" and it kicks me back into the acccount I just tried to change from. This is not unexpected as it can see the password map but not the home directory.

Conversely if I log onto HPUX and try to log onto an account which has it's home directory located on the automounted file system ( i.e. SYS3) everything works OK as you would expect. However if I am on HPUX and I try to log onto an account which has it's home directory on SUN then I am able to log in as that user but I stay in the home directory of the account which I just tried to log in from.

What is causing the discrepancy between these two situations. In summary.

HPUX -> login to account -> home dir on another machine -> login ok but stay in existing directory

SUN -> login to account -> home directory on another machine -> login not ok and kicked out to previous account

Any ideas ???

Henrik

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ypwhich

ypwhich(1)						      General Commands Manual							ypwhich(1)

NAME

       ypwhich - return name of NIS server or map master

SYNOPSIS

       ypwhich [ -d domain ] [ -Vn ] [ hostname ]
       ypwhich [ -d domain ] [ -t ] -m [ mname ]
       ypwhich -x

DESCRIPTION

       ypwhich	returns  the  name of the NIS server that supplies the NIS services to a NIS client, or which is the master for a map.	If invoked
       without arguments, it gives the NIS server for the local machine. If hostname is specified, that machine is queried to find out	which  NIS
       master it is using.

OPTIONS

       -d domain
	      Specify a domain other than the default domain.

       -t     This option inhibits map nickname translation.

       -m mname
	      Find  the  master  NIS server for a map.	No hostname can be specified with the -m option.  mname can be a mapname or nickname for a
	      map.  If mname is omitted, ypwhich will produce a list of available maps.

       -x     Display the map nickname translation table.

       -Vn    Version of ypbind(8), V2 is default.

FILES

       /var/yp/nicknames
	      map nickname translation table.

SEE ALSO

       domainname(8), nicknames(5), ypbind(8), ypcat(1), ypmatch(1), yppoll(8), ypserv(8), ypset(8)

AUTHOR

       ypwhich is part of the yp-tools package, which was written by Thorsten Kukuk <kukuk@linux-nis.org>.

YP Tools 2.14							    April 2010								ypwhich(1)

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