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authorFlorian Klink <flokli@flokli.de>2021-07-17 19:49:42 +0200
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2021-07-23 12:00:20 +0200
commit3e7476e5719e543f6d42fd54f9871b6aed232189 (patch)
treecd1c666bd2457710f056629307d44aade8dcb48a
parentba1b0207bb6d344de0266a1694745ae9f12114a3 (diff)
downloadsystemd-3e7476e5719e543f6d42fd54f9871b6aed232189.tar.gz
man: document nss-{resolve,myhostname} resolving in the other direction, too
(cherry picked from commit 946f7ce32cef44d9bfcf2dc594bb193341434f57) (cherry picked from commit f869a39bceb35406d3193058d6ab5308c2e28f17)
-rw-r--r--man/nss-myhostname.xml7
-rw-r--r--man/nss-resolve.xml6
2 files changed, 12 insertions, 1 deletions
diff --git a/man/nss-myhostname.xml b/man/nss-myhostname.xml
index ce03b66ce4..55d6ddd411 100644
--- a/man/nss-myhostname.xml
+++ b/man/nss-myhostname.xml
@@ -70,7 +70,12 @@
This resolves well-known hostnames like <literal>localhost</literal>
and the machine hostnames locally. It is consistent with the behaviour
of <command>nss-resolve</command>, and still allows overriding via
- <filename>/etc/hosts</filename>.
+ <filename>/etc/hosts</filename>.</para>
+
+ <para>Please keep in mind that <command>nss-myhostname</command> (and <command>nss-resolve</command>) also resolve
+ in the other direction — from locally attached IP adresses to
+ hostnames. If you rely on that lookup being provided by DNS, you might
+ want to order things differently.
</para>
</refsect1>
diff --git a/man/nss-resolve.xml b/man/nss-resolve.xml
index 78c92030ac..717515027d 100644
--- a/man/nss-resolve.xml
+++ b/man/nss-resolve.xml
@@ -52,6 +52,12 @@
it is still recommended (see examples below) to keep <command>nss-myhostname</command> configured in
<filename>/etc/nsswitch.conf</filename>, to keep those names resolveable if
<command>systemd-resolved</command> is not running.</para>
+
+ <para>Please keep in mind that <command>nss-myhostname</command> (and <command>nss-resolve</command>) also resolve
+ in the other direction — from locally attached IP adresses to
+ hostnames. If you rely on that lookup being provided by DNS, you might
+ want to order things differently.
+ </para>
</refsect1>
<refsect1>