diff options
Diffstat (limited to 'man/systemd.netdev.xml')
| -rw-r--r-- | man/systemd.netdev.xml | 53 |
1 files changed, 30 insertions, 23 deletions
diff --git a/man/systemd.netdev.xml b/man/systemd.netdev.xml index 1f9f071b94..585b924e3d 100644 --- a/man/systemd.netdev.xml +++ b/man/systemd.netdev.xml @@ -58,31 +58,38 @@ <citerefentry><refentrytitle>systemd-networkd</refentrytitle><manvolnum>8</manvolnum></citerefentry>. </para> - <para>Virtual Network Device files must have the extension - <filename>.netdev</filename>; other extensions are ignored. - Virtual network devices are created as soon as networkd is - started. If a netdev with the specified name already exists, - networkd will use that as-is rather than create its own. Note that - the settings of the pre-existing netdev will not be changed by + <para>The main Virtual Network Device file must have the extension <filename>.netdev</filename>; + other extensions are ignored. Virtual network devices are created as soon as networkd is + started. If a netdev with the specified name already exists, networkd will use that as-is rather + than create its own. Note that the settings of the pre-existing netdev will not be changed by networkd.</para> - <para>The <filename>.netdev</filename> files are read from the - files located in the system network directory - <filename>/usr/lib/systemd/network</filename>, the volatile - runtime network directory - <filename>/run/systemd/network</filename> and the local - administration network directory - <filename>/etc/systemd/network</filename>. All configuration files - are collectively sorted and processed in lexical order, regardless - of the directories in which they live. However, files with - identical filenames replace each other. Files in - <filename>/etc</filename> have the highest priority, files in - <filename>/run</filename> take precedence over files with the same - name in <filename>/usr/lib</filename>. This can be used to - override a system-supplied configuration file with a local file if - needed. As a special case, an empty file (file size 0) or symlink - with the same name pointing to <filename>/dev/null</filename> - disables the configuration file entirely (it is "masked").</para> + <para>The <filename>.netdev</filename> files are read from the files located in the system + network directory <filename>/usr/lib/systemd/network</filename>, the volatile runtime network + directory <filename>/run/systemd/network</filename> and the local administration network + directory <filename>/etc/systemd/network</filename>. All configuration files are collectively + sorted and processed in lexical order, regardless of the directories in which they live. + However, files with identical filenames replace each other. Files in <filename>/etc</filename> + have the highest priority, files in <filename>/run</filename> take precedence over files with + the same name in <filename>/usr/lib</filename>. This can be used to override a system-supplied + configuration file with a local file if needed. As a special case, an empty file (file size 0) + or symlink with the same name pointing to <filename>/dev/null</filename> disables the + configuration file entirely (it is "masked").</para> + + <para>Along with the netdev file <filename>foo.netdev</filename>, a "drop-in" directory + <filename>foo.netdev.d/</filename> may exist. All files with the suffix <literal>.conf</literal> + from this directory will be parsed after the file itself is parsed. This is useful to alter or + add configuration settings, without having to modify the main configuration file. Each drop-in + file must have appropriate section headers.</para> + + <para>In addition to <filename>/etc/systemd/network</filename>, drop-in <literal>.d</literal> + directories can be placed in <filename>/usr/lib/systemd/network</filename> or + <filename>/run/systemd/network</filename> directories. Drop-in files in + <filename>/etc</filename> take precedence over those in <filename>/run</filename> which in turn + take precedence over those in <filename>/usr/lib</filename>. Drop-in files under any of these + directories take precedence over the main netdev file wherever located. (Of course, since + <filename>/run</filename> is temporary and <filename>/usr/lib</filename> is for vendors, it is + unlikely drop-ins should be used in either of those places.)</para> </refsect1> <refsect1> |