Current File : //usr/share/help/C/system-admin-guide/dconf-lockdown.page
<page xmlns="http://projectmallard.org/1.0/"
xmlns:its="http://www.w3.org/2005/11/its"
type="topic" style="task"
id="dconf-lockdown">
<info>
<link type="guide" xref="user-settings#lockdown" />
<link type="guide" xref="setup" />
<link type="seealso" xref="dconf" />
<link type="seealso" xref="dconf-profiles" />
<revision pkgversion="3.30" date="2019-02-08" status="review"/>
<credit type="author copyright">
<name>Ryan Lortie</name>
<email>desrt@desrt.ca</email>
<years>2012</years>
</credit>
<credit type="copyright editor">
<name>Ekaterina Gerasimova</name>
<email>kittykat3756@gmail.com</email>
<years>2013, 2015</years>
</credit>
<credit type="editor">
<name>Petr Kovar</name>
<email>pknbe@volny.cz</email>
<years>2019</years>
</credit>
<include href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>
<desc>Use the <em>lockdown</em> mode in <sys its:translate="no">dconf</sys>
to prevent users from changing specific settings.</desc>
</info>
<title>Lock down specific settings</title>
<p>By using the lockdown mode in dconf, you can prevent users from changing
specific settings. Without locking down the system settings, user settings
take precedence over the system settings.</p>
<p>To <em>lock down</em> a <sys its:translate="no">dconf</sys> key or subpath,
you will need to create a <file its:translate="no">locks</file> subdirectory
in the keyfile directory. The files inside this directory contain a list of
keys or subpaths to lock. Just as with the <link xref="dconf-keyfiles">keyfiles</link>,
you may add any number of files to this directory.</p>
<steps>
<title>Lock a setting</title>
<item>
<p>Before you can lock down a key or subpath, you need to set it. This
example shows how to lock <link xref="desktop-background">a background
setting</link> once it has been set.</p>
<p>At this point, you should have
<link xref="dconf-profiles">a <sys>user</sys> profile</link> and
<link xref="dconf-keyfiles">a keyfile</link> with the settings that you
want to lock down.</p>
</item>
<item>
<p>Create a directory named
<file its:translate="no">/etc/dconf/db/local.d/locks</file>.</p>
</item>
<item>
<p>Create a file in the
<file its:translate="no">/etc/dconf/db/local.d/locks/</file> directory
and list one key or subpath per line. For example, create
<file its:translate="no">/etc/dconf/db/local.d/locks/00_default-wallpaper</file>:</p>
<code its:translate="no">
# <span its:translate="yes">prevent changes to the background</span>
/org/gnome/desktop/background/picture-uri
/org/gnome/desktop/background/picture-options
/org/gnome/desktop/background/primary-color
/org/gnome/desktop/background/secondary-color
</code>
</item>
<include href="dconf-snippets.xml"
xpointer="xpointer(/*/*[@xml:id='dconf-update'])"
xmlns="http://www.w3.org/2001/XInclude"/>
</steps>
</page>
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