Re: nsswitch.conf again

[Sam Varshavchik <mrsam@xxxxxxxxxxxxxxx>]

Ed Greshko writes:

> On 18/07/2021 20:38, Sam Varshavchik wrote:
> > Eyal Lebedinsky writes:
> >
> > > > In /etc/nsswitch.conf which is a symlink.
> > > >
> > > > [egreshko@meimei etc]$ ll nsswitch.conf
> > > > lrwxrwxrwx. 1 root root 29 Jul 14 16:01 nsswitch.conf ->  
> > > > /etc/authselect/nsswitch.conf
> > >
> > > I have:
> > > $ ll /etc/nsswitch.conf
> > > -rw-r--r-- 1 root root 2150 Jul 18 00:08 /etc/nsswitch.conf
> > >
> > > $ ll /etc/authselect/nsswitch.conf
> > > ls: cannot access '/etc/authselect/nsswitch.conf': No such file or directory
> >
> > I just checked, and none of my machines have /etc/nsswitch.conf as a  
> > symlink. This includes one box that was fresh-installed as F30 (approx).
> >
> > The fresh-installed box had a bunch of files in /etc/authselect.
> >
> > The others, just:
> >
> > [mrsam@monster ~]$ ls -al /etc/authselect/
> > total 32
> > drwxr-xr-x.   3 root root  4096 Jul 17 19:30 .
> > drwxr-xr-x. 212 root root 16384 Jul 17 19:37 ..
> > drwxr-xr-x.   2 root root  4096 Mar 31 07:36 custom
> > -rw-r--r--.   1 root root  1783 Jul 17 19:30 user-nsswitch.conf
> > -rw-r--r--.   1 root root  1783 May 22 09:25 user-nsswitch.conf.bak
> >
> > All of them have authselect-libs installed.
>
> I must say, none of that makes any sense to me.
>
> I just installed a new VM using Fedora-KDE-Live-x86_64-30-1.2.iso. Even the  
> live image has /etc/nsswitch.conf as a sym link
> to /etc/authselect/nsswitch.conf
> And when I connect with that newly installed VM, without having done any  
> updates, I see.
>
> [egreshko@f30k ~]$ ll /etc/nsswitch.conf
> lrwxrwxrwx. 1 root root 29 Jul 19 06:25 /etc/nsswitch.conf ->  
> /etc/authselect/nsswitch.conf
>
> and
>
> [egreshko@f30k ~]$ ls /etc/authselect/
> authselect.conf  dconf-locks       password-auth   system-auth
> custom           fingerprint-auth  postlogin user-nsswitch.conf
> dconf-db         nsswitch.conf     smartcard-auth
>
> So, it is hard for me to understand how your results could be so different  
> than mine unless you've then made changes to your
> system out of habit.
>
> Maybe you can double check what version of fedora you actually did install  
> at the start?  Assuming the logs haven't been
> overgrown you can do "dnf history info 1'.


Transaction ID : 1
Begin time     : Thu 25 Apr 2019 10:07:40 PM EDT
Begin rpmdb    : 0:da39a3ee5e6b4b0d3255bfef95601890afd80709
End time       : Thu 25 Apr 2019 10:12:12 PM EDT (272 seconds)
End rpmdb      : 1495:0e25a85737decf86c21aa98d4f2b17b8e03e5d2a
User           : System <unset>
Return-Code    : Success
Releasever     : 30

That's what it says.

Doing some more poking:

/etc/nsswitch.conf is owned by the glibc package, according to rpm.

rpm -q -l -v glibc says that it's a plain file. It is not a symlink.

I'm going to guess that it's authselect that replaces /etc/nsswitch.conf  
with a symlink:
# authselect current
No existing configuration detected.

I also note:

[root@thinkpad ~]# authselect test minimal
File /etc/nsswitch.conf:
# If you want to make changes to nsswitch.conf please modify
# /etc/authselect/user-nsswitch.conf and run 'authselect apply-changes'.
#
[ more stuff ]

That sounds more like what you are seeing on your machine.

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