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[apt.git] / doc / apt-key.8.xml

diff --git a/doc/apt-key.8.xml b/doc/apt-key.8.xml
index e0d9f5b9575f735ea57a713be4361c511c8754b9..eacd18d4d355a4bcc234cadd29f13893d5e92908 100644 (file)
--- a/doc/apt-key.8.xml
+++ b/doc/apt-key.8.xml
@@ -13,7 +13,7 @@
    &apt-email;
    &apt-product;
    <!-- The last update date -->
-   <date>2016-07-01T00:00:00Z</date>
+   <date>2016-11-25T00:00:00Z</date>
  </refentryinfo>
 
  <refmeta>
@@ -39,7 +39,7 @@
    <para>
    Note that if usage of <command>apt-key</command> is desired the additional
    installation of the GNU Privacy Guard suite (packaged in
-   <package>gnupg</package>) is required. For this reason alone the programatic
+   <package>gnupg</package>) is required. For this reason alone the programmatic
    usage (especially in package maintainerscripts!) is strongly discouraged.
    Further more the output format of all commands is undefined and can and does
    change whenever the underlying commands change. <command>apt-key</command> will
@@ -47,6 +47,20 @@
    </para>
 </refsect1>
 
+<refsect1><title>Supported keyring files</title>
+<para>apt-key supports only the binary OpenPGP format (also known as "GPG key
+   public ring") in files with the "<literal>gpg</literal>" extension, not
+   the keybox database format introduced in newer &gpg; versions as default
+   for keyring files. Binary keyring files intended to be used with any apt
+   version should therefore always be created with <command>gpg --export</command>.
+</para>
+<para>Alternatively, if all systems which should be using the created keyring
+   have at least apt version >= 1.4 installed, you can use the ASCII armored
+   format with the "<literal>asc</literal>" extension instead which can be
+   created with <command>gpg --armor --export</command>.
+</para>
+</refsect1>
+
 <refsect1><title>Commands</title>
    <variablelist>
      <varlistentry><term><option>add</option> <option>&synopsis-param-filename;</option></term>
@@ -63,10 +77,10 @@
      otherwise the &apt-secure; infrastructure is completely undermined.
      </para>
      <para>
-       Instead of using this command a keyring can be placed directly in the
-       <filename>/etc/apt/trusted.gpg.d/</filename> directory with a descriptive name
-       (same rules for filename apply as for &apt-conf; files) and "<literal>gpg</literal>"
-       as file extension.
+       <emphasis>Note</emphasis>: Instead of using this command a keyring
+       should be placed directly in the <filename>/etc/apt/trusted.gpg.d/</filename>
+       directory with a descriptive name and either "<literal>gpg</literal>" or
+       "<literal>asc</literal>" as file extension.
      </para>
      </listitem>
      </varlistentry>
@@ -128,17 +142,21 @@
      </listitem>
      </varlistentry>
 
-     <varlistentry><term><option>update</option></term>
+     <varlistentry><term><option>update</option> (deprecated)</term>
      <listitem>
      <para>
-
        Update the local keyring with the archive keyring and remove from
        the local keyring the archive keys which are no longer valid.
        The archive keyring is shipped in the <literal>archive-keyring</literal> package of your
        distribution, e.g. the &keyring-package; package in &keyring-distro;.
-
      </para>
-
+     <para>
+       Note that a distribution does not need to and in fact should not use
+       this command any longer and instead ship keyring files in the
+       <filename>/etc/apt/trusted.gpg.d/</filename> directory directly as this
+       avoids a dependency on <package>gnupg</package> and it is easier to manage
+       keys by simply adding and removing files for maintainers and users alike.
+     </para>
      </listitem>
      </varlistentry>
      
@@ -181,18 +199,6 @@
 
      &file-trustedgpg;
 
-     <varlistentry><term><filename>/etc/apt/trustdb.gpg</filename></term>
-     <listitem><para>Local trust database of archive keys.</para></listitem>
-     </varlistentry>
-
-     <varlistentry><term>&keyring-filename;</term>
-     <listitem><para>Keyring of &keyring-distro; archive trusted keys.</para></listitem>
-     </varlistentry>
-
-     <varlistentry><term>&keyring-removed-filename;</term>
-     <listitem><para>Keyring of &keyring-distro; archive removed trusted keys.</para></listitem>
-     </varlistentry>
-
    </variablelist>
 
 </refsect1>