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docs: excorcise NIS from nsswitch.conf

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Let's replace the "compat" module in our proposed nsswitch.conf
configuration with "files", since it is not 1995 anymore.

Fedora and other distros have deprecated and removed NIS support a while
back. While others still retain some support I am not sure we should
advertise it in our examples. Downstream can of course still use
"compat" instead of "files" if they want to, but let's not confuse
people who don't care about NIS anymore with this.

Also, bring the nsswitch.conf snippet in README in line with what our
man pages say.

Also see: https://fedoraproject.org/wiki/Changes/retire_NIS_user_space_utils
This commit is contained in:
Lennart Poettering 2023-09-20 11:50:20 +02:00
parent 0d05d1623e
commit 02e9308751
6 changed files with 26 additions and 26 deletions
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13
README
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@ -383,15 +383,16 @@ GLIBC NSS:
DynamicUser= setting in unit files.)
To make use of these NSS modules, please add them to the "hosts:",
"passwd:" and "group:" lines in /etc/nsswitch.conf. The "resolve" module
should replace the glibc "dns" module in this file (and don't worry, it
chain-loads the "dns" module if it can't talk to resolved).
"passwd:", "group:", "shadow:" and "gshadow:" lines in
/etc/nsswitch.conf.
The four modules should be used in the following order:
passwd: compat systemd
group: compat systemd
hosts: files mymachines resolve [!UNAVAIL=return] dns myhostname
passwd: files systemd
group: files [SUCCESS=merge] systemd
shadow: files systemd
gshadow: files systemd
hosts: mymachines resolve [!UNAVAIL=return] files myhostname dns
SYSV INIT.D SCRIPTS:
When calling "systemctl enable/disable/is-enabled" on a unit which is a

6
factory/etc/nsswitch.conf
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@ -1,8 +1,8 @@
# This file is part of systemd.
passwd: compat systemd
group: compat [SUCCESS=merge] systemd
shadow: compat systemd
passwd: files systemd
group: files [SUCCESS=merge] systemd
shadow: files systemd
gshadow: files systemd
hosts: mymachines resolve [!UNAVAIL=return] files myhostname dns

7
man/nss-myhostname.xml
View File

@ -93,12 +93,11 @@
<command>nss-myhostname</command> correctly:</para>
<!-- synchronize with other nss-* man pages and factory/etc/nsswitch.conf -->
<programlisting>passwd: compat systemd
group: compat [SUCCESS=merge] systemd
shadow: compat systemd
<programlisting>passwd: files systemd
group: files [SUCCESS=merge] systemd
shadow: files systemd
gshadow: files systemd
hosts: mymachines resolve [!UNAVAIL=return] files <command>myhostname</command> dns
networks: files

6
man/nss-mymachines.xml
View File

@ -64,9 +64,9 @@
<command>nss-mymachines</command> correctly:</para>
<!-- synchronize with other nss-* man pages and factory/etc/nsswitch.conf -->
<programlisting>passwd: compat systemd
group: compat [SUCCESS=merge] systemd
shadow: compat systemd
<programlisting>passwd: files systemd
group: files [SUCCESS=merge] systemd
shadow: files systemd
gshadow: files systemd
hosts: <command>mymachines</command> resolve [!UNAVAIL=return] files myhostname dns

6
man/nss-resolve.xml
View File

@ -150,9 +150,9 @@
<command>nss-resolve</command> correctly:</para>
<!-- synchronize with other nss-* man pages and factory/etc/nsswitch.conf -->
<programlisting>passwd: compat systemd
group: compat [SUCCESS=merge] systemd
shadow: compat systemd
<programlisting>passwd: files systemd
group: files [SUCCESS=merge] systemd
shadow: files systemd
gshadow: files systemd
hosts: mymachines <command>resolve [!UNAVAIL=return]</command> files myhostname dns

14
man/nss-systemd.xml
View File

@ -50,10 +50,10 @@
<literal>passwd:</literal>, <literal>group:</literal>, <literal>shadow:</literal> and
<literal>gshadow:</literal> in <filename>/etc/nsswitch.conf</filename>.</para>
<para>It is recommended to place <literal>systemd</literal> after the <literal>files</literal> or
<literal>compat</literal> entry of the <filename>/etc/nsswitch.conf</filename> lines so that
<filename>/etc/passwd</filename>, <filename>/etc/group</filename>, <filename>/etc/shadow</filename> and
<filename>/etc/gshadow</filename> based mappings take precedence.</para>
<para>It is recommended to place <literal>systemd</literal> after the <literal>files</literal> entry of
the <filename>/etc/nsswitch.conf</filename> lines so that <filename>/etc/passwd</filename>,
<filename>/etc/group</filename>, <filename>/etc/shadow</filename> and <filename>/etc/gshadow</filename>
based mappings take precedence.</para>
</refsect1>
<refsect1>
@ -106,9 +106,9 @@ lrwxrwxrwx. 1 root root 19 May 10 4711.user-privileged -> foobar.user-privileg
<command>nss-systemd</command> correctly:</para>
<!-- synchronize with other nss-* man pages and factory/etc/nsswitch.conf -->
<programlisting>passwd: compat <command>systemd</command>
group: compat [SUCCESS=merge] <command>systemd</command>
shadow: compat <command>systemd</command>
<programlisting>passwd: files <command>systemd</command>
group: files <command>[SUCCESS=merge] systemd</command>
shadow: files <command>systemd</command>
gshadow: files <command>systemd</command>
hosts: mymachines resolve [!UNAVAIL=return] files myhostname dns