Shadow and NIS

From: Hal Vaughan (hal_at_thresholddigital.com)
Date: 02/28/05

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    To: debian-user@lists.debian.org
Date: Mon, 28 Feb 2005 11:50:03 -0500

    I've installed NIS and it is working, but I'm having a problem with the shadow
    file. (I'm using MEPIS systems for the server and the client I'm testing.)

    The default config on my system is using /etc/shadow, so I specified to
    include shadow in /var/yp/Makfile, but my client system is still not getting
    passwords (I can't ypcat shadow and when I try to login as a user from the
    server, I get an "Authentication service cannot retrieve authentication
    info." error message). I did "ps -ax" and found this line:

    /usr/sbin/rpc.yppasswdd -D /etc -e chsh

    But in a howto (http://www.tldp.org/HOWTO/NIS-HOWTO/ypserv.html), it says to
    start rpc.yppasswdd with:

    rpc.yppasswdd -s /etc/yp/shadow -p /etc/yp/passwd -e chsh

    So here's my main concern: If I change the line in /etc/init.d/nis from the
    first line listed to the 2nd line, will it get clobbered at some point during
    a system update from apt-get?

    Is this the best way to fix this, or is there some better way to either merge
    the passwd and shadow file (I've heard it might not be a good idea to use
    shadow passwords for NIS)? And why is it that when I have this line in the
    Makefile:

    ALL = passwd shadow group hosts rpc services netid protocols netgrp

    (also, later is the line "ALL += shadow")

    the shadow file is not passed on? (I also tried it first without "shadow" in
    the first line.)

    Thanks for any help on this.

    Hal 

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