test: Pass -maxdepth 1 when running find in methods dir

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

diff --git a/doc/apt-get.8.xml b/doc/apt-get.8.xml
index 65929e733bd6609c396b9d438dda29c93c39b2c8..e9623a3ab56947e1e0e3a35744edcee0e36e68fc 100644 (file)
--- a/doc/apt-get.8.xml
+++ b/doc/apt-get.8.xml
@@ -1,13 +1,9 @@
 <?xml version="1.0" encoding="utf-8" standalone="no"?>
 <?xml version="1.0" encoding="utf-8" standalone="no"?>

-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
-
-<!ENTITY % aptent SYSTEM "apt.ent">
-%aptent;
-
-<!ENTITY % aptverbatiment SYSTEM "apt-verbatim.ent">
-%aptverbatiment;
-
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
+<!ENTITY % aptent SYSTEM "apt.ent"> %aptent;
+<!ENTITY % aptverbatiment SYSTEM "apt-verbatim.ent"> %aptverbatiment;
+<!ENTITY % aptvendor SYSTEM "apt-vendor.ent"> %aptvendor;

 ]>
 
 <refentry>
 ]>
 
 <refentry>


@@ -18,7 +14,7 @@
    &apt-email;
    &apt-product;
    <!-- The last update date -->
    &apt-email;
    &apt-product;
    <!-- The last update date -->

-   <date>08 November 2008</date>
+   <date>2016-07-08T00:00:00Z</date>

  </refentryinfo>
  
  <refmeta>
  </refentryinfo>
  
  <refmeta>


@@ -38,14 +34,14 @@
  <refsect1><title>Description</title>
    <para><command>apt-get</command> is the command-line tool for handling packages, and may be 
    considered the user's "back-end" to other tools using the APT
  <refsect1><title>Description</title>
    <para><command>apt-get</command> is the command-line tool for handling packages, and may be 
    considered the user's "back-end" to other tools using the APT

-   library.  Several "front-end" interfaces exist, such as &dselect;,
+   library.  Several "front-end" interfaces exist, such as

    &aptitude;, &synaptic; and &wajig;.</para>
 
    <para>Unless the <option>-h</option>, or <option>--help</option> option is given, one of the
    commands below must be present.</para>
    
    <variablelist>
    &aptitude;, &synaptic; and &wajig;.</para>
 
    <para>Unless the <option>-h</option>, or <option>--help</option> option is given, one of the
    commands below must be present.</para>
    
    <variablelist>

-     <varlistentry><term>update</term>
+     <varlistentry><term><option>update</option></term>

      <listitem><para><literal>update</literal> is used to resynchronize the package index files from
      their sources. The indexes of available packages are fetched from the
      location(s) specified in <filename>/etc/apt/sources.list</filename>.
      <listitem><para><literal>update</literal> is used to resynchronize the package index files from
      their sources. The indexes of available packages are fetched from the
      location(s) specified in <filename>/etc/apt/sources.list</filename>.


@@ -57,7 +53,7 @@
      of the package files cannot be known in advance.</para></listitem>
      </varlistentry>
      
      of the package files cannot be known in advance.</para></listitem>
      </varlistentry>
      

-     <varlistentry><term>upgrade</term>
+     <varlistentry><term><option>upgrade</option></term>

      <listitem><para><literal>upgrade</literal> is used to install the newest versions of all packages 
      currently installed on the system from the sources enumerated in
      <filename>/etc/apt/sources.list</filename>. Packages currently installed with 
      <listitem><para><literal>upgrade</literal> is used to install the newest versions of all packages 
      currently installed on the system from the sources enumerated in
      <filename>/etc/apt/sources.list</filename>. Packages currently installed with 


@@ -70,37 +66,37 @@
      available.</para></listitem>
      </varlistentry>
 
      available.</para></listitem>
      </varlistentry>
 

-     <varlistentry><term>dselect-upgrade</term>
-     <listitem><para><literal>dselect-upgrade</literal>
-     is used in conjunction with the traditional Debian packaging
-     front-end, &dselect;. <literal>dselect-upgrade</literal>
-     follows the changes made by &dselect; to the <literal>Status</literal>
-     field of available packages, and performs the actions necessary to realize
-     that state (for instance, the removal of old and the installation of new
-     packages).</para></listitem>
-     </varlistentry>
-
-     <varlistentry><term>dist-upgrade</term>
+     <varlistentry><term><option>dist-upgrade</option></term>

      <listitem><para><literal>dist-upgrade</literal> in addition to performing the function of 
      <literal>upgrade</literal>, also intelligently handles changing dependencies 
      with new versions of packages; <command>apt-get</command> has a "smart" conflict 
      resolution system, and it will attempt to upgrade the most important 
      packages at the expense of less important ones if necessary. 
      <listitem><para><literal>dist-upgrade</literal> in addition to performing the function of 
      <literal>upgrade</literal>, also intelligently handles changing dependencies 
      with new versions of packages; <command>apt-get</command> has a "smart" conflict 
      resolution system, and it will attempt to upgrade the most important 
      packages at the expense of less important ones if necessary. 

-        So, <literal>dist-upgrade</literal> command may remove some packages.
+     The <literal>dist-upgrade</literal> command may therefore remove some packages.

      The <filename>/etc/apt/sources.list</filename> file contains a list of locations 
      from which to retrieve desired package files.
      See also &apt-preferences; for a mechanism for
      overriding the general settings for individual packages.</para></listitem>
      </varlistentry>
 
      The <filename>/etc/apt/sources.list</filename> file contains a list of locations 
      from which to retrieve desired package files.
      See also &apt-preferences; for a mechanism for
      overriding the general settings for individual packages.</para></listitem>
      </varlistentry>
 

-     <varlistentry><term>install</term>
+     <varlistentry><term><option>dselect-upgrade</option></term>
+     <listitem><para><literal>dselect-upgrade</literal>
+     is used in conjunction with the traditional Debian packaging
+     front-end, &dselect;. <literal>dselect-upgrade</literal>
+     follows the changes made by &dselect; to the <literal>Status</literal>
+     field of available packages, and performs the actions necessary to realize
+     that state (for instance, the removal of old and the installation of new
+     packages).</para></listitem>
+     </varlistentry>
+
+     <varlistentry><term><option>install</option></term>

      <listitem>
         <para><literal>install</literal> is followed by one or more 
         packages desired for installation or upgrading. 
         Each package is a package name, not a fully qualified 
      <listitem>
         <para><literal>install</literal> is followed by one or more 
         packages desired for installation or upgrading. 
         Each package is a package name, not a fully qualified 

-        filename (for instance, in a Debian GNU/Linux system, 
-        libc6 would be the argument provided, not 
-        <literal>libc6_1.9.6-2.deb</literal>). All packages required 
+        filename (for instance, in a Debian system, 
+        <package>apt-utils</package> would be the argument provided, not 
+        <filename>apt-utils_&apt-product-version;_amd64.deb</filename>). All packages required 

         by the package(s) specified for installation will also 
         be retrieved and installed. 
         The <filename>/etc/apt/sources.list</filename> file is 
         by the package(s) specified for installation will also 
         be retrieved and installed. 
         The <filename>/etc/apt/sources.list</filename> file is 


@@ -147,20 +143,20 @@
      with a '^' or '$' character, or create a more specific regular expression.</para></listitem>
      </varlistentry>
 
      with a '^' or '$' character, or create a more specific regular expression.</para></listitem>
      </varlistentry>
 

-     <varlistentry><term>remove</term>
+     <varlistentry><term><option>remove</option></term>

      <listitem><para><literal>remove</literal> is identical to <literal>install</literal> except that packages are 
      <listitem><para><literal>remove</literal> is identical to <literal>install</literal> except that packages are 

-        removed instead of installed. Note the removing a package leaves its
-        configuration files in system. If a plus sign is appended to the package 
+        removed instead of installed. Note that removing a package leaves its
+        configuration files on the system. If a plus sign is appended to the package 

      name (with no intervening space), the identified package will be 
      installed instead of removed.</para></listitem>
      </varlistentry>
 
      name (with no intervening space), the identified package will be 
      installed instead of removed.</para></listitem>
      </varlistentry>
 

-     <varlistentry><term>purge</term>
+     <varlistentry><term><option>purge</option></term>

      <listitem><para><literal>purge</literal> is identical to <literal>remove</literal> except that packages are 
      removed and purged (any configuration files are deleted too).</para></listitem>
      </varlistentry>
 
      <listitem><para><literal>purge</literal> is identical to <literal>remove</literal> except that packages are 
      removed and purged (any configuration files are deleted too).</para></listitem>
      </varlistentry>
 

-     <varlistentry><term>source</term>
+     <varlistentry><term><option>source</option></term>

      <listitem><para><literal>source</literal> causes <command>apt-get</command> to fetch source packages. APT 
      will examine the available packages to decide which source package to 
      fetch. It will then find and download into the current directory the 
      <listitem><para><literal>source</literal> causes <command>apt-get</command> to fetch source packages. APT 
      will examine the available packages to decide which source package to 
      fetch. It will then find and download into the current directory the 


@@ -170,11 +166,10 @@
      <literal>pkg/release</literal> syntax, if possible.</para>
 
      <para>Source packages are tracked separately
      <literal>pkg/release</literal> syntax, if possible.</para>
 
      <para>Source packages are tracked separately

-     from binary packages via <literal>deb-src</literal> type lines 
+     from binary packages via <literal>deb-src</literal> lines 

      in the &sources-list; file. This means that you will need to add such a line
      in the &sources-list; file. This means that you will need to add such a line

-     for each repository you want to get sources from. If you don't do this
-     you will properly get another (newer, older or none) source version than
-     the one you have installed or could install.</para>
+     for each repository you want to get sources from; otherwise you will probably
+     get either the wrong (too old/too new) source versions or none at all.</para>

 
      <para>If the <option>--compile</option> option is specified
      then the package will be compiled to a binary .deb using
 
      <para>If the <option>--compile</option> option is specified
      then the package will be compiled to a binary .deb using


@@ -188,41 +183,38 @@
      used for the package files. This enables exact matching of the source 
      package name and version, implicitly enabling the 
      <literal>APT::Get::Only-Source</literal> option.</para>
      used for the package files. This enables exact matching of the source 
      package name and version, implicitly enabling the 
      <literal>APT::Get::Only-Source</literal> option.</para>

-     
-     <para>Note that source packages are not tracked like binary packages, they 
-     exist only in the current directory and are similar to downloading source
-     tar balls.</para></listitem>
+
+     <para>Note that source packages are not installed and tracked in the
+     <command>dpkg</command> database like binary packages; they are simply downloaded
+     to the current directory, like source tarballs.</para></listitem>

      </varlistentry>
 
      </varlistentry>
 

-     <varlistentry><term>build-dep</term>
+     <varlistentry><term><option>build-dep</option></term>

      <listitem><para><literal>build-dep</literal> causes apt-get to install/remove packages in an 
      attempt to satisfy the build dependencies for a source package. By default the dependencies are
      satisfied to build the package natively. If desired a host-architecture can be specified
      with the <option>--host-architecture</option> option instead.</para></listitem>
      </varlistentry>
 
      <listitem><para><literal>build-dep</literal> causes apt-get to install/remove packages in an 
      attempt to satisfy the build dependencies for a source package. By default the dependencies are
      satisfied to build the package natively. If desired a host-architecture can be specified
      with the <option>--host-architecture</option> option instead.</para></listitem>
      </varlistentry>
 

-     <varlistentry><term>check</term>
+     <varlistentry><term><option>check</option></term>

      <listitem><para><literal>check</literal> is a diagnostic tool; it updates the package cache and checks 
      for broken dependencies.</para></listitem>
      </varlistentry>
 
      <listitem><para><literal>check</literal> is a diagnostic tool; it updates the package cache and checks 
      for broken dependencies.</para></listitem>
      </varlistentry>
 

-     <varlistentry><term>download</term>
+     <varlistentry><term><option>download</option></term>

        <listitem><para><literal>download</literal> will download the given
            binary package into the current directory.
        </para></listitem>
      </varlistentry>
 
        <listitem><para><literal>download</literal> will download the given
            binary package into the current directory.
        </para></listitem>
      </varlistentry>
 

-     <varlistentry><term>clean</term>
+     <varlistentry><term><option>clean</option></term>

      <listitem><para><literal>clean</literal> clears out the local repository of retrieved package 
      files. It removes everything but the lock file from 
      <filename>&cachedir;/archives/</filename> and 
      <listitem><para><literal>clean</literal> clears out the local repository of retrieved package 
      files. It removes everything but the lock file from 
      <filename>&cachedir;/archives/</filename> and 

-     <filename>&cachedir;/archives/partial/</filename>. When APT is used as a 
-     &dselect; method, <literal>clean</literal> is run automatically.
-     Those who do not use dselect will likely want to run <literal>apt-get clean</literal>
-     from time to time to free up disk space.</para></listitem>
+     <filename>&cachedir;/archives/partial/</filename>.</para></listitem>

      </varlistentry>
 
      </varlistentry>
 

-     <varlistentry><term>autoclean</term>
+     <varlistentry><term><option>autoclean</option> (and the <option>auto-clean</option> alias since 1.1)</term>

      <listitem><para>Like <literal>clean</literal>, <literal>autoclean</literal> clears out the local 
      repository of retrieved package files. The difference is that it only 
      removes package files that can no longer be downloaded, and are largely 
      <listitem><para>Like <literal>clean</literal>, <literal>autoclean</literal> clears out the local 
      repository of retrieved package files. The difference is that it only 
      removes package files that can no longer be downloaded, and are largely 


@@ -232,25 +224,36 @@
      erased if it is set to off.</para></listitem>
      </varlistentry>
 
      erased if it is set to off.</para></listitem>
      </varlistentry>
 

-     <varlistentry><term>autoremove</term>
+     <varlistentry><term><option>autoremove</option> (and the <option>auto-remove</option> alias since 1.1)</term>

      <listitem><para><literal>autoremove</literal> is used to remove packages that were automatically
      installed to satisfy dependencies for other packages and are now no longer needed.</para></listitem>
      </varlistentry>
 
      <listitem><para><literal>autoremove</literal> is used to remove packages that were automatically
      installed to satisfy dependencies for other packages and are now no longer needed.</para></listitem>
      </varlistentry>
 

-     <varlistentry><term>changelog</term>
-       <listitem><para><literal>changelog</literal> downloads a package changelog and displays
-           it through <command>sensible-pager</command>. The server name and base
-           directory is defined in the <literal>APT::Changelogs::Server</literal>
-           variable (e. g. <ulink>http://packages.debian.org/changelogs</ulink> for
-           Debian or <ulink>http://changelogs.ubuntu.com/changelogs</ulink> for
-           Ubuntu).
-           By default it displays the changelog for the version that is
-           installed.  However, you can specify the same options as for
-           the <option>install</option> command.
-         </para>
+     <varlistentry><term><option>changelog</option></term>
+       <listitem><para><literal>changelog</literal> tries to download the
+             changelog of a package and displays it through
+             <command>sensible-pager</command>.  By default it
+             displays the changelog for the version that is installed.
+             However, you can specify the same options as for the
+             <option>install</option> command.</para>

        </listitem>
      </varlistentry>
 
        </listitem>
      </varlistentry>
 

+     <varlistentry><term><option>indextargets</option></term>
+       <listitem><para>Displays by default a deb822 formatted listing of
+             information about all data files (aka index targets) <command>apt-get
+                update</command> would download. Supports a
+             <option>--format</option> option to modify the output format as
+             well as accepts lines of the default output to filter the records
+             by. The command is mainly used as an interface for external tools
+             working with APT to get information as well as filenames for
+             downloaded files so they can use them as well instead of
+             downloading them again on their own. Detailed documentation is
+             omitted here and can instead be found in the file
+             &apt-acquire-additional-files; shipped by the <package>apt-doc</package> package.
+          </para>
+       </listitem>
+     </varlistentry>

 
 
    </variablelist>
 
 
    </variablelist>


@@ -283,7 +286,7 @@
      running APT for the first time; APT itself does not allow broken package 
      dependencies to exist on a system. It is possible that a system's 
      dependency structure can be so corrupt as to require manual intervention 
      running APT for the first time; APT itself does not allow broken package 
      dependencies to exist on a system. It is possible that a system's 
      dependency structure can be so corrupt as to require manual intervention 

-     (which usually means using &dselect; or <command>dpkg --remove</command> to eliminate some of 
+     (which usually means using <command>dpkg --remove</command> to eliminate some of

      the offending packages). Use of this option together with <option>-m</option> may produce an
      error in some situations. 
      Configuration Item: <literal>APT::Get::Fix-Broken</literal>.</para></listitem>
      the offending packages). Use of this option together with <option>-m</option> may produce an
      error in some situations. 
      Configuration Item: <literal>APT::Get::Fix-Broken</literal>.</para></listitem>


@@ -291,7 +294,7 @@
 
      <varlistentry><term><option>-m</option></term><term><option>--ignore-missing</option></term>
      <term><option>--fix-missing</option></term>
 
      <varlistentry><term><option>-m</option></term><term><option>--ignore-missing</option></term>
      <term><option>--fix-missing</option></term>

-     <listitem><para>Ignore missing packages; If packages cannot be retrieved or fail the    
+     <listitem><para>Ignore missing packages; if packages cannot be retrieved or fail the    

      integrity check after retrieval (corrupted package files), hold back    
      those packages and handle the result. Use of this option together with  
      <option>-f</option> may produce an error in some situations. If a package is 
      integrity check after retrieval (corrupted package files), hold back    
      those packages and handle the result. Use of this option together with  
      <option>-f</option> may produce an error in some situations. If a package is 


@@ -312,9 +315,9 @@
      <listitem><para>Quiet; produces output suitable for logging, omitting progress indicators.
      More q's will produce more quiet up to a maximum of 2. You can also use
      <option>-q=#</option> to set the quiet level, overriding the configuration file. 
      <listitem><para>Quiet; produces output suitable for logging, omitting progress indicators.
      More q's will produce more quiet up to a maximum of 2. You can also use
      <option>-q=#</option> to set the quiet level, overriding the configuration file. 

-     Note that quiet level 2 implies <option>-y</option>, you should never use -qq 
+     Note that quiet level 2 implies <option>-y</option>; you should never use -qq 

      without a no-action modifier such as -d, --print-uris or -s as APT may 
      without a no-action modifier such as -d, --print-uris or -s as APT may 

-     decided to do something you did not expect.
+     decide to do something you did not expect.

      Configuration Item: <literal>quiet</literal>.</para></listitem>
      </varlistentry>
 
      Configuration Item: <literal>quiet</literal>.</para></listitem>
      </varlistentry>
 


@@ -324,21 +327,20 @@
                   <term><option>--dry-run</option></term>
                   <term><option>--recon</option></term>
                   <term><option>--no-act</option></term>
                   <term><option>--dry-run</option></term>
                   <term><option>--recon</option></term>
                   <term><option>--no-act</option></term>

-     <listitem><para>No action; perform a simulation of events that would occur but do not
-     actually change the system. 
-     Configuration Item: <literal>APT::Get::Simulate</literal>.</para>
-
-     <para>Simulation run as user will deactivate locking (<literal>Debug::NoLocking</literal>)
-     automatic. Also a notice will be displayed indicating that this is only a simulation,
-     if the option <literal>APT::Get::Show-User-Simulation-Note</literal> is set (Default: true).
-     Neither NoLocking nor the notice will be triggered if run as root (root should know what
-     he is doing without further warnings by <literal>apt-get</literal>).</para>
-
-     <para>Simulate prints out
-     a series of lines each one representing a dpkg operation, Configure (Conf),
-     Remove (Remv), Unpack (Inst). Square brackets indicate broken packages
-     and empty set of square brackets meaning breaks that are of no consequence
-     (rare).</para></listitem>
+     <listitem><para>No action; perform a simulation of events that would occur
+          based on the current system state but do not actually change the
+          system. Locking will be disabled (<option>Debug::NoLocking</option>)
+          so the system state could change while <command>apt-get</command> is
+          running. Simulations can also be executed by non-root users which might
+          not have read access to all apt configuration distorting the simulation.
+          A notice expressing this warning is also shown by default for non-root
+          users (<option>APT::Get::Show-User-Simulation-Note</option>).
+          Configuration Item: <literal>APT::Get::Simulate</literal>.</para>
+
+     <para>Simulated runs print out a series of lines, each representing a <command>dpkg</command>
+     operation: configure (<literal>Conf</literal>), remove (<literal>Remv</literal>)
+     or unpack (<literal>Inst</literal>). Square brackets indicate broken packages, and
+     empty square brackets indicate breaks that are of no consequence (rare).</para></listitem>

      </varlistentry>
 
      <varlistentry><term><option>-y</option></term><term><option>--yes</option></term>
      </varlistentry>
 
      <varlistentry><term><option>-y</option></term><term><option>--yes</option></term>


@@ -355,9 +357,8 @@
      Configuration Item: <literal>APT::Get::Assume-No</literal>.</para></listitem>
      </varlistentry>
 
      Configuration Item: <literal>APT::Get::Assume-No</literal>.</para></listitem>
      </varlistentry>
 

-     <varlistentry><term><option>-u</option></term><term><option>--show-upgraded</option></term>
-     <listitem><para>Show upgraded packages; Print out a list of all packages that are to be
-     upgraded. 
+     <varlistentry><term><option>--no-show-upgraded</option></term>
+     <listitem><para>Do not show a list of all packages that are to be upgraded.

      Configuration Item: <literal>APT::Get::Show-Upgraded</literal>.</para></listitem>
      </varlistentry>
 
      Configuration Item: <literal>APT::Get::Show-Upgraded</literal>.</para></listitem>
      </varlistentry>
 


@@ -372,7 +373,18 @@
      by <command>apt-get source --compile</command> and how cross-builddependencies
      are satisfied. By default is it not set which means that the host architecture
      is the same as the build architecture (which is defined by <literal>APT::Architecture</literal>).
      by <command>apt-get source --compile</command> and how cross-builddependencies
      are satisfied. By default is it not set which means that the host architecture
      is the same as the build architecture (which is defined by <literal>APT::Architecture</literal>).

-     Configuration Item: <literal>APT::Get::Host-Architecture</literal>
+     Configuration Item: <literal>APT::Get::Host-Architecture</literal>.
+     </para></listitem>
+     </varlistentry>
+
+     <varlistentry><term><option>-P</option></term>
+                   <term><option>--build-profiles</option></term>
+     <listitem><para>This option controls the activated build profiles for which
+     a source package is built by <command>apt-get source --compile</command> and
+     how build dependencies are satisfied. By default no build profile is active.
+     More than one build profile can be activated at a time by concatenating them
+     with a comma.
+     Configuration Item: <literal>APT::Build-Profiles</literal>.

      </para></listitem>
      </varlistentry>
 
      </para></listitem>
      </varlistentry>
 


@@ -383,38 +395,75 @@
      </varlistentry>
 
      <varlistentry><term><option>--ignore-hold</option></term>
      </varlistentry>
 
      <varlistentry><term><option>--ignore-hold</option></term>

-     <listitem><para>Ignore package Holds; This causes <command>apt-get</command> to ignore a hold 
+     <listitem><para>Ignore package holds; this causes <command>apt-get</command> to ignore a hold 

      placed on a package. This may be useful in conjunction with 
      <literal>dist-upgrade</literal> to override a large number of undesired holds. 
      Configuration Item: <literal>APT::Ignore-Hold</literal>.</para></listitem>
      </varlistentry>
 
      placed on a package. This may be useful in conjunction with 
      <literal>dist-upgrade</literal> to override a large number of undesired holds. 
      Configuration Item: <literal>APT::Ignore-Hold</literal>.</para></listitem>
      </varlistentry>
 

+     <varlistentry><term><option>--with-new-pkgs</option></term>
+     <listitem><para>Allow installing new packages when used in
+     conjunction with <literal>upgrade</literal>.  This is useful if
+     the update of a installed package requires new dependencies to be
+     installed. Instead of holding the package back <literal>upgrade</literal>
+     will upgrade the package and install the new dependencies. Note that
+     <literal>upgrade</literal> with this option will never remove packages,
+     only allow adding new ones.
+     Configuration Item:  <literal>APT::Get::Upgrade-Allow-New</literal>.
+     </para></listitem>
+     </varlistentry>
+

      <varlistentry><term><option>--no-upgrade</option></term>
      <varlistentry><term><option>--no-upgrade</option></term>

-     <listitem><para>Do not upgrade packages; When used in conjunction with <literal>install</literal>,
+     <listitem><para>Do not upgrade packages; when used in conjunction with <literal>install</literal>,

      <literal>no-upgrade</literal> will prevent packages on the command line
      from being upgraded if they are already installed.
      Configuration Item: <literal>APT::Get::Upgrade</literal>.</para></listitem>
      </varlistentry>
 
      <varlistentry><term><option>--only-upgrade</option></term>
      <literal>no-upgrade</literal> will prevent packages on the command line
      from being upgraded if they are already installed.
      Configuration Item: <literal>APT::Get::Upgrade</literal>.</para></listitem>
      </varlistentry>
 
      <varlistentry><term><option>--only-upgrade</option></term>

-     <listitem><para>Do not install new packages; When used in conjunction with <literal>install</literal>,
-     <literal>only-upgrade</literal> will prevent packages on the command line
-     from being upgraded if they are not already installed.
+     <listitem><para>Do not install new packages; when used in conjunction
+     with <literal>install</literal>, <literal>only-upgrade</literal> will
+     install upgrades for already installed packages only and ignore requests
+     to install new packages.

      Configuration Item: <literal>APT::Get::Only-Upgrade</literal>.</para></listitem>
      </varlistentry>
 
      Configuration Item: <literal>APT::Get::Only-Upgrade</literal>.</para></listitem>
      </varlistentry>
 

+     <varlistentry><term><option>--allow-downgrades</option></term>
+     <listitem><para>This is a dangerous option that will cause apt to continue
+     without prompting if it is doing downgrades. It
+     should not be used except in very special situations. Using
+     it can potentially destroy your system!
+     Configuration Item: <literal>APT::Get::allow-downgrades</literal>. Introduced in APT 1.1.</para></listitem>
+     </varlistentry>
+
+     <varlistentry><term><option>--allow-remove-essential</option></term>
+     <listitem><para>Force yes; this is a dangerous option that will cause apt to continue
+     without prompting if it is removing essentials. It
+     should not be used except in very special situations. Using
+     it can potentially destroy your system!
+     Configuration Item: <literal>APT::Get::allow-remove-essential</literal>. Introduced in APT 1.1.</para></listitem>
+     </varlistentry>
+
+     <varlistentry><term><option>--allow-change-held-packages</option></term>
+     <listitem><para>Force yes; this is a dangerous option that will cause apt to continue
+     without prompting if it is changing held packages. It
+     should not be used except in very special situations. Using
+     it can potentially destroy your system!
+     Configuration Item: <literal>APT::Get::allow-change-held-packages</literal>. Introduced in APT 1.1.</para></listitem>
+     </varlistentry>
+

      <varlistentry><term><option>--force-yes</option></term>
      <varlistentry><term><option>--force-yes</option></term>

-     <listitem><para>Force yes; This is a dangerous option that will cause apt to continue 
+     <listitem><para>Force yes; this is a dangerous option that will cause apt to continue 

      without prompting if it is doing something potentially harmful. It 
      should not be used except in very special situations. Using 
      <literal>force-yes</literal> can potentially destroy your system! 
      without prompting if it is doing something potentially harmful. It 
      should not be used except in very special situations. Using 
      <literal>force-yes</literal> can potentially destroy your system! 

-     Configuration Item: <literal>APT::Get::force-yes</literal>.</para></listitem>
+     Configuration Item: <literal>APT::Get::force-yes</literal>. This is deprecated and replaced by <option>--allow-downgrades</option>, <option>--allow-remove-essential</option>, <option>--allow-change-held-packages</option> in 1.1. </para></listitem>

      </varlistentry>
 
      <varlistentry><term><option>--print-uris</option></term>
      <listitem><para>Instead of fetching the files to install their URIs are printed. Each
      URI will have the path, the destination file name, the size and the expected
      </varlistentry>
 
      <varlistentry><term><option>--print-uris</option></term>
      <listitem><para>Instead of fetching the files to install their URIs are printed. Each
      URI will have the path, the destination file name, the size and the expected

-     md5 hash. Note that the file name to write to will not always match
+     MD5 hash. Note that the file name to write to will not always match

      the file name on the remote site! This also works with the 
      <literal>source</literal> and <literal>update</literal> commands. When used with the
      <literal>update</literal> command the MD5 and size are not included, and it is
      the file name on the remote site! This also works with the 
      <literal>source</literal> and <literal>update</literal> commands. When used with the
      <literal>update</literal> command the MD5 and size are not included, and it is


@@ -431,23 +480,22 @@
      </varlistentry>
 
      <varlistentry><term><option>--reinstall</option></term>
      </varlistentry>
 
      <varlistentry><term><option>--reinstall</option></term>

-     <listitem><para>Re-Install packages that are already installed and at the newest version.
+     <listitem><para>Re-install packages that are already installed and at the newest version.

      Configuration Item: <literal>APT::Get::ReInstall</literal>.</para></listitem>
      </varlistentry>
 
      <varlistentry><term><option>--list-cleanup</option></term>
      Configuration Item: <literal>APT::Get::ReInstall</literal>.</para></listitem>
      </varlistentry>
 
      <varlistentry><term><option>--list-cleanup</option></term>

-     <listitem><para>This option defaults to on, use <literal>--no-list-cleanup</literal> to turn it 
-     off. When on <command>apt-get</command> will automatically manage the contents of 
-     <filename>&statedir;/lists</filename> to ensure that obsolete files are erased. 
-     The only  reason to turn it off is if you frequently change your source 
-     list. 
+     <listitem><para>This option is on by default; use <literal>--no-list-cleanup</literal> to turn
+     it off. When it is on, <command>apt-get</command> will automatically manage the contents
+     of <filename>&statedir;/lists</filename> to ensure that obsolete files are erased.
+     The only reason to turn it off is if you frequently change your sources list.

      Configuration Item: <literal>APT::Get::List-Cleanup</literal>.</para></listitem>
      </varlistentry>
 
      <varlistentry><term><option>-t</option></term>
                    <term><option>--target-release</option></term>
                    <term><option>--default-release</option></term>
      Configuration Item: <literal>APT::Get::List-Cleanup</literal>.</para></listitem>
      </varlistentry>
 
      <varlistentry><term><option>-t</option></term>
                    <term><option>--target-release</option></term>
                    <term><option>--default-release</option></term>

-     <listitem><para>This option controls the default input to the policy engine, it creates
+     <listitem><para>This option controls the default input to the policy engine; it creates

      a default pin at priority 990 using the specified release string.
      This overrides the general settings in <filename>/etc/apt/preferences</filename>.
      Specifically pinned packages are not affected by the value
      a default pin at priority 990 using the specified release string.
      This overrides the general settings in <filename>/etc/apt/preferences</filename>.
      Specifically pinned packages are not affected by the value


@@ -463,7 +511,7 @@
      <varlistentry><term><option>--trivial-only</option></term>
      <listitem><para>
      Only perform operations that are 'trivial'. Logically this can be considered
      <varlistentry><term><option>--trivial-only</option></term>
      <listitem><para>
      Only perform operations that are 'trivial'. Logically this can be considered

-     related to <option>--assume-yes</option>, where <option>--assume-yes</option> will answer 
+     related to <option>--assume-yes</option>; where <option>--assume-yes</option> will answer 

      yes to any prompt, <option>--trivial-only</option> will answer no. 
      Configuration Item: <literal>APT::Get::Trivial-Only</literal>.</para></listitem>
      </varlistentry>
      yes to any prompt, <option>--trivial-only</option> will answer no. 
      Configuration Item: <literal>APT::Get::Trivial-Only</literal>.</para></listitem>
      </varlistentry>


@@ -476,7 +524,7 @@
 
      <varlistentry><term><option>--auto-remove</option></term>
      <listitem><para>If the command is either <literal>install</literal> or <literal>remove</literal>,
 
      <varlistentry><term><option>--auto-remove</option></term>
      <listitem><para>If the command is either <literal>install</literal> or <literal>remove</literal>,

-     then this option acts like running <literal>autoremove</literal> command, removing the unused
+     then this option acts like running the <literal>autoremove</literal> command, removing unused

      dependency packages. Configuration Item: <literal>APT::Get::AutomaticRemove</literal>.
      </para></listitem>
      </varlistentry>
      dependency packages. Configuration Item: <literal>APT::Get::AutomaticRemove</literal>.
      </para></listitem>
      </varlistentry>


@@ -504,11 +552,32 @@
      </varlistentry>
 
      <varlistentry><term><option>--allow-unauthenticated</option></term>
      </varlistentry>
 
      <varlistentry><term><option>--allow-unauthenticated</option></term>

-     <listitem><para>Ignore if packages can't be authenticated and don't prompt about it.
-     This is useful for tools like pbuilder.
-     Configuration Item: <literal>APT::Get::AllowUnauthenticated</literal>.</para></listitem>
+     <listitem><para>Ignore if packages can't be authenticated and don't prompt
+          about it.  This can be useful while working with local repositories,
+          but is a huge security risk if data authenticity isn't ensured in
+          another way by the user itself.  The usage of the
+          <option>Trusted</option> option for &sources-list; entries should
+          usually be preferred over this global override.  Configuration Item:
+          <literal>APT::Get::AllowUnauthenticated</literal>.</para></listitem>
+     </varlistentry>
+
+     <varlistentry><term><option>--no-allow-insecure-repositories</option></term>
+     <listitem><para>Forbid the update command to acquire unverifiable
+     data from configured sources. APT will fail at the update command
+     for repositories without valid cryptographically signatures. See
+     also &apt-secure; for details on the concept and the implications.
+
+     Configuration Item: <literal>Acquire::AllowInsecureRepositories</literal>.</para></listitem>

      </varlistentry>
      </varlistentry>

-     
+
+     <varlistentry><term><option>--show-progress</option></term>
+     <listitem><para>Show user friendly progress information in the
+     terminal window when packages are installed, upgraded or
+     removed. For a machine parsable version of this data see
+     README.progress-reporting in the apt doc directory.
+     Configuration Item: <literal>Dpkg::Progress</literal> and <literal>Dpkg::Progress-Fancy</literal>.</para></listitem>
+     </varlistentry>
+    

 
      &apt-commonoptions;
      
 
      &apt-commonoptions;
      


@@ -526,7 +595,7 @@
  </refsect1>
 
  <refsect1><title>See Also</title>
  </refsect1>
 
  <refsect1><title>See Also</title>

-   <para>&apt-cache;, &apt-cdrom;, &dpkg;, &dselect;, &sources-list;,
+   <para>&apt-cache;, &apt-cdrom;, &dpkg;, &sources-list;,

    &apt-conf;, &apt-config;, &apt-secure;, 
    The APT User's guide in &guidesdir;, &apt-preferences;, the APT Howto.</para>
  </refsect1>
    &apt-conf;, &apt-config;, &apt-secure;, 
    The APT User's guide in &guidesdir;, &apt-preferences;, the APT Howto.</para>
  </refsect1>


@@ -534,16 +603,5 @@
  <refsect1><title>Diagnostics</title>
    <para><command>apt-get</command> returns zero on normal operation, decimal 100 on error.</para>
  </refsect1>
  <refsect1><title>Diagnostics</title>
    <para><command>apt-get</command> returns zero on normal operation, decimal 100 on error.</para>
  </refsect1>

- <refsect1>
-        <title>ORIGINAL AUTHORS</title>
-        <para>&apt-author.jgunthorpe;</para>
- </refsect1>
- <refsect1>
-        <title>CURRENT AUTHORS</title>
-        <para>
-                &apt-author.team;
-        </para>
-                &apt-qapage;
- </refsect1>

  &manbugs;
 </refentry>
  &manbugs;
 </refentry>