/usr/share/help/kn/gnome-help/session-fingerprint.page is in gnome-user-docs-kn 3.28.1-0ubuntu1.
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<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" type="topic" style="task" id="session-fingerprint" xml:lang="kn">
<info>
<link type="guide" xref="hardware-auth"/>
<revision pkgversion="3.4.0" date="2012-02-19" status="outdated"/>
<revision pkgversion="3.10" date="2013-11-03" status="review"/>
<revision pkgversion="3.12" date="2014-06-16" status="final"/>
<revision pkgversion="3.13.92" date="2014-09-22" status="final"/>
<credit type="author">
<name>GNOME Documentation Project</name>
<email>gnome-doc-list@gnome.org</email>
</credit>
<credit type="author">
<name>Paul W. Frields</name>
<email>stickster@gmail.com</email>
<years>2011</years>
</credit>
<credit type="author editor">
<name>Ekaterina Gerasimova</name>
<email>kittykat3756@gmail.com</email>
<years>2013</years>
</credit>
<credit type="editor">
<name>Jim Campbell</name>
<email>jcampbell@gnome.org</email>
<years>2014</years>
</credit>
<include xmlns="http://www.w3.org/2001/XInclude" href="legal.xml"/>
<desc>You can log in to your system using a supported fingerprint scanner
instead of typing in your password.</desc>
</info>
<title>Log in with a fingerprint</title>
<p>If your system has a supported fingerprint scanner, you can record your
fingerprint and use it to log in.</p>
<section id="record">
<title>Record a fingerprint</title>
<p>Before you can log in with your fingerprint, you need to record it so that
the system can use it to identify you.</p>
<note style="tip">
<p>If your finger is too dry, you may have difficulty registering your
fingerprint. If this happens, moisten your finger slightly, dry it with a
clean, lint-free cloth, and retry.</p>
</note>
<p>You need <link xref="user-admin-explain">administrator privileges</link>
to edit user accounts other than your own.</p>
<steps>
<item>
<p>Open the <gui xref="shell-introduction#activities">Activities</gui> overview and
start typing <gui>Users</gui>.</p>
</item>
<item>
<p>Click on <gui>Users</gui> to open the panel.</p>
</item>
<item>
<p>Press on <gui>Disabled</gui>, next to <gui>Fingerprint Login</gui> to
add a fingerprint for the selected account. If you are adding the
fingerprint for a different user, you will first need to
<gui>Unlock</gui> the panel.</p>
</item>
<item>
<p>Select the finger that you want to use for the fingerprint, then
<gui style="button">Next</gui>.</p>
</item>
<item>
<p>Follow the instructions in the dialog and swipe your finger at a
<em>moderate speed</em> over your fingerprint reader. Once the computer
has a good record of your fingerprint, you will see a <gui>Done!</gui>
message.</p>
</item>
<item>
<p>Select <gui>Next</gui>. You will see a confirmation message that
your fingerprint was saved successfully. Select <gui>Close</gui> to
finish.</p>
</item>
</steps>
</section>
<section id="verify">
<title>Check that your fingerprint works</title>
<p>Now check that your new fingerprint login works. If you register a
fingerprint, you still have the option to log in with your password.</p>
<steps>
<item>
<p>Save any open work, and then <link xref="shell-exit#logout">log
out</link>.</p>
</item>
<item>
<p>At the login screen, select your name from the list. The password
entry form will appear.</p>
</item>
<item>
<p>Instead of typing your password, you should be able to swipe your
finger on the fingerprint reader.</p>
</item>
</steps>
</section>
</page>
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