doc/apt-get.8.xml

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   5 <!ENTITY % aptent SYSTEM "apt.ent">
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   8 <!ENTITY % aptverbatiment SYSTEM "apt-verbatim.ent">
   9 %aptverbatiment;
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  12
  13 <refentry>
  14
  15  <refentryinfo>
  16    &apt-author.jgunthorpe;
  17    &apt-author.team;
  18    &apt-email;
  19    &apt-product;
  20    <!-- The last update date -->
  21    <date>2012-05-21T00:00:00Z</date>
  22  </refentryinfo>
  23
  24  <refmeta>
  25    <refentrytitle>apt-get</refentrytitle>
  26    <manvolnum>8</manvolnum>
  27    <refmiscinfo class="manual">APT</refmiscinfo>
  28  </refmeta>
  29
  30  <!-- Man page title -->
  31  <refnamediv>
  32     <refname>apt-get</refname>
  33     <refpurpose>APT package handling utility -- command-line interface</refpurpose>
  34  </refnamediv>
  35
  36  &synopsis-command-apt-get;
  37
  38  <refsect1><title>Description</title>
  39    <para><command>apt-get</command> is the command-line tool for handling packages, and may be
  40    considered the user's "back-end" to other tools using the APT
  41    library.  Several "front-end" interfaces exist, such as &dselect;,
  42    &aptitude;, &synaptic; and &wajig;.</para>
  43
  44    <para>Unless the <option>-h</option>, or <option>--help</option> option is given, one of the
  45    commands below must be present.</para>
  46
  47    <variablelist>
  48      <varlistentry><term><option>update</option></term>
  49      <listitem><para><literal>update</literal> is used to resynchronize the package index files from
  50      their sources. The indexes of available packages are fetched from the
  51      location(s) specified in <filename>/etc/apt/sources.list</filename>.
  52      For example, when using a Debian archive, this command retrieves and
  53      scans the <filename>Packages.gz</filename> files, so that information about new
  54      and updated packages is available. An <literal>update</literal> should always be
  55      performed before an <literal>upgrade</literal> or <literal>dist-upgrade</literal>. Please
  56      be aware that the overall progress meter will be incorrect as the size
  57      of the package files cannot be known in advance.</para></listitem>
  58      </varlistentry>
  59
  60      <varlistentry><term><option>upgrade</option></term>
  61      <listitem><para><literal>upgrade</literal> is used to install the newest versions of all packages
  62      currently installed on the system from the sources enumerated in
  63      <filename>/etc/apt/sources.list</filename>. Packages currently installed with
  64      new versions available are retrieved and upgraded; under no circumstances
  65      are currently installed packages removed, or packages not already installed
  66      retrieved and installed. New versions of currently installed packages that
  67      cannot be upgraded without changing the install status of another package
  68      will be left at their current version. An <literal>update</literal> must be
  69      performed first so that <command>apt-get</command> knows that new versions of packages are
  70      available.</para></listitem>
  71      </varlistentry>
  72
  73      <varlistentry><term><option>dselect-upgrade</option></term>
  74      <listitem><para><literal>dselect-upgrade</literal>
  75      is used in conjunction with the traditional Debian packaging
  76      front-end, &dselect;. <literal>dselect-upgrade</literal>
  77      follows the changes made by &dselect; to the <literal>Status</literal>
  78      field of available packages, and performs the actions necessary to realize
  79      that state (for instance, the removal of old and the installation of new
  80      packages).</para></listitem>
  81      </varlistentry>
  82
  83      <varlistentry><term><option>dist-upgrade</option></term>
  84      <listitem><para><literal>dist-upgrade</literal> in addition to performing the function of
  85      <literal>upgrade</literal>, also intelligently handles changing dependencies
  86      with new versions of packages; <command>apt-get</command> has a "smart" conflict
  87      resolution system, and it will attempt to upgrade the most important
  88      packages at the expense of less important ones if necessary.
  89          So, <literal>dist-upgrade</literal> command may remove some packages.
  90      The <filename>/etc/apt/sources.list</filename> file contains a list of locations
  91      from which to retrieve desired package files.
  92      See also &apt-preferences; for a mechanism for
  93      overriding the general settings for individual packages.</para></listitem>
  94      </varlistentry>
  95
  96      <varlistentry><term><option>install</option></term>
  97      <listitem>
  98          <para><literal>install</literal> is followed by one or more
  99          packages desired for installation or upgrading.
 100          Each package is a package name, not a fully qualified
 101          filename (for instance, in a Debian GNU/Linux system,
 102          libc6 would be the argument provided, not
 103          <literal>libc6_1.9.6-2.deb</literal>). All packages required
 104          by the package(s) specified for installation will also
 105          be retrieved and installed.
 106          The <filename>/etc/apt/sources.list</filename> file is
 107          used to locate the desired packages. If a hyphen is
 108          appended to the package name (with no intervening space),
 109          the identified package will be removed if it is installed.
 110          Similarly a plus sign can be used to designate a
 111          package to install. These latter features may be used
 112          to override decisions made by apt-get's conflict
 113          resolution system.
 114          </para>
 115
 116      <para>A specific version of a package can be selected for installation by
 117      following the package name with an equals and the version of the package
 118      to select. This will cause that version to be located and selected for
 119      install. Alternatively a specific distribution can be selected by
 120      following the package name with a slash and the version of the
 121      distribution or the Archive name (stable, testing, unstable).</para>
 122
 123      <para>Both of the version selection mechanisms can downgrade packages and must
 124      be used with care.</para>
 125
 126         <para>This is also the target to use if you want to upgrade one or
 127                 more already-installed packages without upgrading every package
 128                 you have on your system. Unlike the "upgrade" target, which
 129                 installs the newest version of all currently installed packages,
 130                 "install" will install the newest version of only the package(s)
 131                 specified. Simply provide the name of the package(s) you wish
 132                 to upgrade, and if a newer version is available, it (and its
 133                 dependencies, as described above) will be downloaded and
 134                 installed.
 135         </para>
 136
 137      <para>Finally, the &apt-preferences; mechanism allows you to
 138      create an alternative installation policy for
 139      individual packages.</para>
 140
 141      <para>If no package matches the given expression and the expression contains one
 142      of '.', '?' or '*' then it is assumed to be a POSIX regular expression,
 143      and it is applied
 144      to all package names in the database. Any matches are then installed (or
 145      removed). Note that matching is done by substring so 'lo.*' matches 'how-lo'
 146      and 'lowest'. If this is undesired, anchor the regular expression
 147      with a '^' or '$' character, or create a more specific regular expression.</para></listitem>
 148      </varlistentry>
 149
 150      <varlistentry><term><option>remove</option></term>
 151      <listitem><para><literal>remove</literal> is identical to <literal>install</literal> except that packages are
 152          removed instead of installed. Note the removing a package leaves its
 153          configuration files in system. If a plus sign is appended to the package
 154      name (with no intervening space), the identified package will be
 155      installed instead of removed.</para></listitem>
 156      </varlistentry>
 157
 158      <varlistentry><term><option>purge</option></term>
 159      <listitem><para><literal>purge</literal> is identical to <literal>remove</literal> except that packages are
 160      removed and purged (any configuration files are deleted too).</para></listitem>
 161      </varlistentry>
 162
 163      <varlistentry><term><option>source</option></term>
 164      <listitem><para><literal>source</literal> causes <command>apt-get</command> to fetch source packages. APT
 165      will examine the available packages to decide which source package to
 166      fetch. It will then find and download into the current directory the
 167      newest available version of that source package while respecting the
 168      default release, set with the option <literal>APT::Default-Release</literal>,
 169      the <option>-t</option> option or per package with the
 170      <literal>pkg/release</literal> syntax, if possible.</para>
 171
 172      <para>Source packages are tracked separately
 173      from binary packages via <literal>deb-src</literal> type lines
 174      in the &sources-list; file. This means that you will need to add such a line
 175      for each repository you want to get sources from. If you don't do this
 176      you will properly get another (newer, older or none) source version than
 177      the one you have installed or could install.</para>
 178
 179      <para>If the <option>--compile</option> option is specified
 180      then the package will be compiled to a binary .deb using
 181      <command>dpkg-buildpackage</command> for the architecture as
 182      defined by the <command>--host-architecture</command> option.
 183      If <option>--download-only</option> is specified then the source package
 184      will not be unpacked.</para>
 185
 186      <para>A specific source version can be retrieved by postfixing the source name
 187      with an equals and then the version to fetch, similar to the mechanism
 188      used for the package files. This enables exact matching of the source
 189      package name and version, implicitly enabling the
 190      <literal>APT::Get::Only-Source</literal> option.</para>
 191
 192      <para>Note that source packages are not tracked like binary packages, they
 193      exist only in the current directory and are similar to downloading source
 194      tar balls.</para></listitem>
 195      </varlistentry>
 196
 197      <varlistentry><term><option>build-dep</option></term>
 198      <listitem><para><literal>build-dep</literal> causes apt-get to install/remove packages in an
 199      attempt to satisfy the build dependencies for a source package. By default the dependencies are
 200      satisfied to build the package natively. If desired a host-architecture can be specified
 201      with the <option>--host-architecture</option> option instead.</para></listitem>
 202      </varlistentry>
 203
 204      <varlistentry><term><option>check</option></term>
 205      <listitem><para><literal>check</literal> is a diagnostic tool; it updates the package cache and checks
 206      for broken dependencies.</para></listitem>
 207      </varlistentry>
 208
 209      <varlistentry><term><option>download</option></term>
 210        <listitem><para><literal>download</literal> will download the given
 211            binary package into the current directory.
 212        </para></listitem>
 213      </varlistentry>
 214
 215      <varlistentry><term><option>clean</option></term>
 216      <listitem><para><literal>clean</literal> clears out the local repository of retrieved package
 217      files. It removes everything but the lock file from
 218      <filename>&cachedir;/archives/</filename> and
 219      <filename>&cachedir;/archives/partial/</filename>. When APT is used as a
 220      &dselect; method, <literal>clean</literal> is run automatically.
 221      Those who do not use dselect will likely want to run <literal>apt-get clean</literal>
 222      from time to time to free up disk space.</para></listitem>
 223      </varlistentry>
 224
 225      <varlistentry><term><option>autoclean</option></term>
 226      <listitem><para>Like <literal>clean</literal>, <literal>autoclean</literal> clears out the local
 227      repository of retrieved package files. The difference is that it only
 228      removes package files that can no longer be downloaded, and are largely
 229      useless. This allows a cache to be maintained over a long period without
 230      it growing out of control. The configuration option
 231      <literal>APT::Clean-Installed</literal> will prevent installed packages from being
 232      erased if it is set to off.</para></listitem>
 233      </varlistentry>
 234
 235      <varlistentry><term><option>autoremove</option></term>
 236      <listitem><para><literal>autoremove</literal> is used to remove packages that were automatically
 237      installed to satisfy dependencies for other packages and are now no longer needed.</para></listitem>
 238      </varlistentry>
 239
 240      <varlistentry><term><option>changelog</option></term>
 241        <listitem><para><literal>changelog</literal> downloads a package changelog and displays
 242            it through <command>sensible-pager</command>. The server name and base
 243            directory is defined in the <literal>APT::Changelogs::Server</literal>
 244            variable (e. g. <ulink url="http://packages.debian.org/changelogs">packages.debian.org/changelogs</ulink> for
 245            Debian or <ulink url="http://changelogs.ubuntu.com/changelogs">changelogs.ubuntu.com/changelogs</ulink> for
 246            Ubuntu).
 247            By default it displays the changelog for the version that is
 248            installed.  However, you can specify the same options as for
 249            the <option>install</option> command.
 250          </para>
 251        </listitem>
 252      </varlistentry>
 253
 254
 255
 256    </variablelist>
 257  </refsect1>
 258
 259  <refsect1><title>options</title>
 260    &apt-cmdblurb;
 261
 262    <variablelist>
 263      <varlistentry><term><option>--no-install-recommends</option></term>
 264      <listitem><para>Do not consider recommended packages as a dependency for installing.
 265      Configuration Item: <literal>APT::Install-Recommends</literal>.</para></listitem>
 266      </varlistentry>
 267
 268      <varlistentry><term><option>--install-suggests</option></term>
 269      <listitem><para>Consider suggested packages as a dependency for installing.
 270      Configuration Item: <literal>APT::Install-Suggests</literal>.</para></listitem>
 271      </varlistentry>
 272
 273      <varlistentry><term><option>-d</option></term><term><option>--download-only</option></term>
 274      <listitem><para>Download only; package files are only retrieved, not unpacked or installed.
 275      Configuration Item: <literal>APT::Get::Download-Only</literal>.</para></listitem>
 276      </varlistentry>
 277
 278      <varlistentry><term><option>-f</option></term><term><option>--fix-broken</option></term>
 279      <listitem><para>Fix; attempt to correct a system with broken dependencies in
 280      place. This option, when used with install/remove, can omit any packages
 281      to permit APT to deduce a likely solution. If packages are specified,
 282      these have to completely correct the problem. The option is sometimes necessary when
 283      running APT for the first time; APT itself does not allow broken package
 284      dependencies to exist on a system. It is possible that a system's
 285      dependency structure can be so corrupt as to require manual intervention
 286      (which usually means using &dselect; or <command>dpkg --remove</command> to eliminate some of
 287      the offending packages). Use of this option together with <option>-m</option> may produce an
 288      error in some situations.
 289      Configuration Item: <literal>APT::Get::Fix-Broken</literal>.</para></listitem>
 290      </varlistentry>
 291
 292      <varlistentry><term><option>-m</option></term><term><option>--ignore-missing</option></term>
 293      <term><option>--fix-missing</option></term>
 294      <listitem><para>Ignore missing packages; If packages cannot be retrieved or fail the
 295      integrity check after retrieval (corrupted package files), hold back
 296      those packages and handle the result. Use of this option together with
 297      <option>-f</option> may produce an error in some situations. If a package is
 298      selected for installation (particularly if it is mentioned on the
 299      command line) and it could not be downloaded then it will be silently
 300      held back.
 301      Configuration Item: <literal>APT::Get::Fix-Missing</literal>.</para></listitem>
 302      </varlistentry>
 303
 304      <varlistentry><term><option>--no-download</option></term>
 305      <listitem><para>Disables downloading of packages. This is best used with
 306      <option>--ignore-missing</option> to force APT to use only the .debs it has
 307      already downloaded.
 308      Configuration Item: <literal>APT::Get::Download</literal>.</para></listitem>
 309      </varlistentry>
 310
 311      <varlistentry><term><option>-q</option></term><term><option>--quiet</option></term>
 312      <listitem><para>Quiet; produces output suitable for logging, omitting progress indicators.
 313      More q's will produce more quiet up to a maximum of 2. You can also use
 314      <option>-q=#</option> to set the quiet level, overriding the configuration file.
 315      Note that quiet level 2 implies <option>-y</option>, you should never use -qq
 316      without a no-action modifier such as -d, --print-uris or -s as APT may
 317      decided to do something you did not expect.
 318      Configuration Item: <literal>quiet</literal>.</para></listitem>
 319      </varlistentry>
 320
 321      <varlistentry><term><option>-s</option></term>
 322                    <term><option>--simulate</option></term>
 323                    <term><option>--just-print</option></term>
 324                    <term><option>--dry-run</option></term>
 325                    <term><option>--recon</option></term>
 326                    <term><option>--no-act</option></term>
 327      <listitem><para>No action; perform a simulation of events that would occur but do not
 328      actually change the system.
 329      Configuration Item: <literal>APT::Get::Simulate</literal>.</para>
 330
 331      <para>Simulation run as user will deactivate locking (<literal>Debug::NoLocking</literal>)
 332      automatic. Also a notice will be displayed indicating that this is only a simulation,
 333      if the option <literal>APT::Get::Show-User-Simulation-Note</literal> is set (Default: true).
 334      Neither NoLocking nor the notice will be triggered if run as root (root should know what
 335      he is doing without further warnings by <literal>apt-get</literal>).</para>
 336
 337      <para>Simulate prints out
 338      a series of lines each one representing a dpkg operation, Configure (Conf),
 339      Remove (Remv), Unpack (Inst). Square brackets indicate broken packages
 340      and empty set of square brackets meaning breaks that are of no consequence
 341      (rare).</para></listitem>
 342      </varlistentry>
 343
 344      <varlistentry><term><option>-y</option></term><term><option>--yes</option></term>
 345                    <term><option>--assume-yes</option></term>
 346      <listitem><para>Automatic yes to prompts; assume "yes" as answer to all prompts and run
 347      non-interactively. If an undesirable situation, such as changing a held
 348      package, trying to install a unauthenticated package or removing an essential package
 349      occurs then <literal>apt-get</literal> will abort.
 350      Configuration Item: <literal>APT::Get::Assume-Yes</literal>.</para></listitem>
 351      </varlistentry>
 352
 353      <varlistentry><term><option>--assume-no</option></term>
 354      <listitem><para>Automatic "no" to all prompts.
 355      Configuration Item: <literal>APT::Get::Assume-No</literal>.</para></listitem>
 356      </varlistentry>
 357
 358      <varlistentry><term><option>-u</option></term><term><option>--show-upgraded</option></term>
 359      <listitem><para>Show upgraded packages; Print out a list of all packages that are to be
 360      upgraded.
 361      Configuration Item: <literal>APT::Get::Show-Upgraded</literal>.</para></listitem>
 362      </varlistentry>
 363
 364      <varlistentry><term><option>-V</option></term><term><option>--verbose-versions</option></term>
 365      <listitem><para>Show full versions for upgraded and installed packages.
 366      Configuration Item: <literal>APT::Get::Show-Versions</literal>.</para></listitem>
 367      </varlistentry>
 368
 369      <varlistentry><term><option>-a</option></term>
 370                    <term><option>--host-architecture</option></term>
 371      <listitem><para>This option controls the architecture packages are built for
 372      by <command>apt-get source --compile</command> and how cross-builddependencies
 373      are satisfied. By default is it not set which means that the host architecture
 374      is the same as the build architecture (which is defined by <literal>APT::Architecture</literal>).
 375      Configuration Item: <literal>APT::Get::Host-Architecture</literal>
 376      </para></listitem>
 377      </varlistentry>
 378
 379      <varlistentry><term><option>-b</option></term><term><option>--compile</option></term>
 380                    <term><option>--build</option></term>
 381      <listitem><para>Compile source packages after downloading them.
 382      Configuration Item: <literal>APT::Get::Compile</literal>.</para></listitem>
 383      </varlistentry>
 384
 385      <varlistentry><term><option>--ignore-hold</option></term>
 386      <listitem><para>Ignore package Holds; This causes <command>apt-get</command> to ignore a hold
 387      placed on a package. This may be useful in conjunction with
 388      <literal>dist-upgrade</literal> to override a large number of undesired holds.
 389      Configuration Item: <literal>APT::Ignore-Hold</literal>.</para></listitem>
 390      </varlistentry>
 391
 392      <varlistentry><term><option>--no-upgrade</option></term>
 393      <listitem><para>Do not upgrade packages; When used in conjunction with <literal>install</literal>,
 394      <literal>no-upgrade</literal> will prevent packages on the command line
 395      from being upgraded if they are already installed.
 396      Configuration Item: <literal>APT::Get::Upgrade</literal>.</para></listitem>
 397      </varlistentry>
 398
 399      <varlistentry><term><option>--only-upgrade</option></term>
 400      <listitem><para>Do not install new packages; When used in conjunction
 401      with <literal>install</literal>, <literal>only-upgrade</literal> will
 402      install upgrades for already installed packages only and ignore requests
 403      to install new packages.
 404      Configuration Item: <literal>APT::Get::Only-Upgrade</literal>.</para></listitem>
 405      </varlistentry>
 406
 407      <varlistentry><term><option>--force-yes</option></term>
 408      <listitem><para>Force yes; This is a dangerous option that will cause apt to continue
 409      without prompting if it is doing something potentially harmful. It
 410      should not be used except in very special situations. Using
 411      <literal>force-yes</literal> can potentially destroy your system!
 412      Configuration Item: <literal>APT::Get::force-yes</literal>.</para></listitem>
 413      </varlistentry>
 414
 415      <varlistentry><term><option>--print-uris</option></term>
 416      <listitem><para>Instead of fetching the files to install their URIs are printed. Each
 417      URI will have the path, the destination file name, the size and the expected
 418      md5 hash. Note that the file name to write to will not always match
 419      the file name on the remote site! This also works with the
 420      <literal>source</literal> and <literal>update</literal> commands. When used with the
 421      <literal>update</literal> command the MD5 and size are not included, and it is
 422      up to the user to decompress any compressed files.
 423      Configuration Item: <literal>APT::Get::Print-URIs</literal>.</para></listitem>
 424      </varlistentry>
 425
 426      <varlistentry><term><option>--purge</option></term>
 427      <listitem><para>Use purge instead of remove for anything that would be removed.
 428      An asterisk ("*") will be displayed next to packages which are
 429          scheduled to be purged. <option>remove --purge</option> is equivalent to the
 430          <option>purge</option> command.
 431      Configuration Item: <literal>APT::Get::Purge</literal>.</para></listitem>
 432      </varlistentry>
 433
 434      <varlistentry><term><option>--reinstall</option></term>
 435      <listitem><para>Re-Install packages that are already installed and at the newest version.
 436      Configuration Item: <literal>APT::Get::ReInstall</literal>.</para></listitem>
 437      </varlistentry>
 438
 439      <varlistentry><term><option>--list-cleanup</option></term>
 440      <listitem><para>This option defaults to on, use <literal>--no-list-cleanup</literal> to turn it
 441      off. When on <command>apt-get</command> will automatically manage the contents of
 442      <filename>&statedir;/lists</filename> to ensure that obsolete files are erased.
 443      The only  reason to turn it off is if you frequently change your source
 444      list.
 445      Configuration Item: <literal>APT::Get::List-Cleanup</literal>.</para></listitem>
 446      </varlistentry>
 447
 448      <varlistentry><term><option>-t</option></term>
 449                    <term><option>--target-release</option></term>
 450                    <term><option>--default-release</option></term>
 451      <listitem><para>This option controls the default input to the policy engine, it creates
 452      a default pin at priority 990 using the specified release string.
 453      This overrides the general settings in <filename>/etc/apt/preferences</filename>.
 454      Specifically pinned packages are not affected by the value
 455      of this option. In short, this option
 456      lets you have simple control over which distribution packages will be
 457      retrieved from. Some common examples might be
 458      <option>-t '2.1*'</option>, <option>-t unstable</option>
 459      or <option>-t sid</option>.
 460      Configuration Item: <literal>APT::Default-Release</literal>;
 461      see also the &apt-preferences; manual page.</para></listitem>
 462      </varlistentry>
 463
 464      <varlistentry><term><option>--trivial-only</option></term>
 465      <listitem><para>
 466      Only perform operations that are 'trivial'. Logically this can be considered
 467      related to <option>--assume-yes</option>, where <option>--assume-yes</option> will answer
 468      yes to any prompt, <option>--trivial-only</option> will answer no.
 469      Configuration Item: <literal>APT::Get::Trivial-Only</literal>.</para></listitem>
 470      </varlistentry>
 471
 472      <varlistentry><term><option>--no-remove</option></term>
 473      <listitem><para>If any packages are to be removed apt-get immediately aborts without
 474      prompting.
 475      Configuration Item: <literal>APT::Get::Remove</literal>.</para></listitem>
 476      </varlistentry>
 477
 478      <varlistentry><term><option>--auto-remove</option></term>
 479      <listitem><para>If the command is either <literal>install</literal> or <literal>remove</literal>,
 480      then this option acts like running <literal>autoremove</literal> command, removing the unused
 481      dependency packages. Configuration Item: <literal>APT::Get::AutomaticRemove</literal>.
 482      </para></listitem>
 483      </varlistentry>
 484
 485      <varlistentry><term><option>--only-source</option></term>
 486      <listitem><para>Only has meaning for the
 487      <literal>source</literal> and <literal>build-dep</literal>
 488      commands.  Indicates that the given source names are not to be
 489      mapped through the binary table.  This means that if this option
 490      is specified, these commands will only accept source package
 491      names as arguments, rather than accepting binary package names
 492      and looking up the corresponding source package.  Configuration
 493      Item: <literal>APT::Get::Only-Source</literal>.</para></listitem>
 494      </varlistentry>
 495
 496      <varlistentry><term><option>--diff-only</option></term><term><option>--dsc-only</option></term><term><option>--tar-only</option></term>
 497      <listitem><para>Download only the diff, dsc, or tar file of a source archive.
 498      Configuration Item: <literal>APT::Get::Diff-Only</literal>, <literal>APT::Get::Dsc-Only</literal>, and
 499      <literal>APT::Get::Tar-Only</literal>.</para></listitem>
 500      </varlistentry>
 501
 502      <varlistentry><term><option>--arch-only</option></term>
 503      <listitem><para>Only process architecture-dependent build-dependencies.
 504      Configuration Item: <literal>APT::Get::Arch-Only</literal>.</para></listitem>
 505      </varlistentry>
 506
 507      <varlistentry><term><option>--allow-unauthenticated</option></term>
 508      <listitem><para>Ignore if packages can't be authenticated and don't prompt about it.
 509      This is useful for tools like pbuilder.
 510      Configuration Item: <literal>APT::Get::AllowUnauthenticated</literal>.</para></listitem>
 511      </varlistentry>
 512
 513
 514      &apt-commonoptions;
 515
 516    </variablelist>
 517  </refsect1>
 518
 519  <refsect1><title>Files</title>
 520    <variablelist>
 521      &file-sourceslist;
 522      &file-aptconf;
 523      &file-preferences;
 524      &file-cachearchives;
 525      &file-statelists;
 526    </variablelist>
 527  </refsect1>
 528
 529  <refsect1><title>See Also</title>
 530    <para>&apt-cache;, &apt-cdrom;, &dpkg;, &dselect;, &sources-list;,
 531    &apt-conf;, &apt-config;, &apt-secure;,
 532    The APT User's guide in &guidesdir;, &apt-preferences;, the APT Howto.</para>
 533  </refsect1>
 534
 535  <refsect1><title>Diagnostics</title>
 536    <para><command>apt-get</command> returns zero on normal operation, decimal 100 on error.</para>
 537  </refsect1>
 538  &manbugs;
 539 </refentry>