doc/apt-get.8.xml

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   5 <!ENTITY % aptent SYSTEM "apt.ent">
   6 %aptent;
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   9
  10 <refentry>
  11
  12  <refentryinfo>
  13    &apt-author.jgunthorpe;
  14    &apt-author.team;
  15    &apt-email;
  16    &apt-product;
  17    <!-- The last update date -->
  18    <date>08 November 2008</date>
  19  </refentryinfo>
  20
  21  <refmeta>
  22    <refentrytitle>apt-get</refentrytitle>
  23    <manvolnum>8</manvolnum>
  24  </refmeta>
  25
  26  <!-- Man page title -->
  27  <refnamediv>
  28     <refname>apt-get</refname>
  29     <refpurpose>APT package handling utility -- command-line interface</refpurpose>
  30  </refnamediv>
  31
  32  <!-- Arguments -->
  33  <refsynopsisdiv>
  34    <cmdsynopsis>
  35       <command>apt-get</command>
  36       <arg><option>-sqdyfmubV</option></arg>
  37       <arg>
  38               <option>-o=
  39                           <replaceable>config_string</replaceable>
  40               </option>
  41       </arg>
  42       <arg>
  43               <option>-c=
  44                       <replaceable>config_file</replaceable>
  45               </option>
  46       </arg>
  47       <arg>
  48                   <option>-t=</option>
  49                   <group choice='req'>
  50                           <arg choice='plain'>
  51                                   <replaceable>target_release_name</replaceable>
  52                           </arg>
  53                           <arg choice='plain'>
  54                                   <replaceable>target_release_number_expression</replaceable>
  55                           </arg>
  56                           <arg choice='plain'>
  57                                   <replaceable>target_release_codename</replaceable>
  58                           </arg>
  59                   </group>
  60       </arg>
  61
  62       <group choice="req">
  63          <arg choice='plain'>update</arg>
  64          <arg choice='plain'>upgrade</arg>
  65          <arg choice='plain'>dselect-upgrade</arg>
  66          <arg choice='plain'>dist-upgrade</arg>
  67          <arg choice='plain'>install
  68                          <arg choice="plain" rep="repeat"><replaceable>pkg</replaceable>
  69                                 <arg>
  70                                         <group choice='req'>
  71                                                 <arg choice='plain'>
  72                                                         =<replaceable>pkg_version_number</replaceable>
  73                                                 </arg>
  74                                                 <arg choice='plain'>
  75                                                         /<replaceable>target_release_name</replaceable>
  76                                                 </arg>
  77                                                 <arg choice='plain'>
  78                                                         /<replaceable>target_release_codename</replaceable>
  79                                                 </arg>
  80                                         </group>
  81                                 </arg>
  82                          </arg>
  83              </arg>
  84          <arg choice='plain'>remove <arg choice="plain" rep="repeat"><replaceable>pkg</replaceable></arg></arg>
  85          <arg choice='plain'>purge <arg choice="plain" rep="repeat"><replaceable>pkg</replaceable></arg></arg>
  86          <arg choice='plain'>source
  87                          <arg choice="plain" rep="repeat"><replaceable>pkg</replaceable>
  88                                 <arg>
  89                                         <group choice='req'>
  90                                                 <arg choice='plain'>
  91                                                         =<replaceable>pkg_version_number</replaceable>
  92                                                 </arg>
  93                                                 <arg choice='plain'>
  94                                                         /<replaceable>target_release_name</replaceable>
  95                                                 </arg>
  96                                                 <arg choice='plain'>
  97                                                         /<replaceable>target_release_codename</replaceable>
  98                                                 </arg>
  99                                         </group>
 100                                 </arg>
 101                          </arg>
 102              </arg>
 103          <arg choice='plain'>build-dep <arg choice="plain" rep="repeat"><replaceable>pkg</replaceable></arg></arg>
 104          <arg choice='plain'>check</arg>
 105          <arg choice='plain'>clean</arg>
 106          <arg choice='plain'>autoclean</arg>
 107          <arg choice='plain'>autoremove</arg>
 108                  <arg choice='plain'>
 109                          <group choice='req'>
 110                                 <arg choice='plain'>-v</arg>
 111                                 <arg choice='plain'>--version</arg>
 112                          </group>
 113                  </arg>
 114                  <arg choice='plain'>
 115                          <group choice='req'>
 116                                 <arg choice='plain'>-h</arg>
 117                                 <arg choice='plain'>--help</arg>
 118                          </group>
 119                  </arg>
 120       </group>
 121    </cmdsynopsis>
 122  </refsynopsisdiv>
 123
 124  <refsect1><title>Description</title>
 125    <para><command>apt-get</command> is the command-line tool for handling packages, and may be
 126    considered the user's "back-end" to other tools using the APT
 127    library.  Several "front-end" interfaces exist, such as &dselect;,
 128    &aptitude;, &synaptic;, &gnome-apt; and &wajig;.</para>
 129
 130    <para>Unless the <option>-h</option>, or <option>--help</option> option is given, one of the
 131    commands below must be present.</para>
 132
 133    <variablelist>
 134      <varlistentry><term>update</term>
 135      <listitem><para><literal>update</literal> is used to resynchronize the package index files from
 136      their sources. The indexes of available packages are fetched from the
 137      location(s) specified in <filename>/etc/apt/sources.list</filename>.
 138      For example, when using a Debian archive, this command retrieves and
 139      scans the <filename>Packages.gz</filename> files, so that information about new
 140      and updated packages is available. An <literal>update</literal> should always be
 141      performed before an <literal>upgrade</literal> or <literal>dist-upgrade</literal>. Please
 142      be aware that the overall progress meter will be incorrect as the size
 143      of the package files cannot be known in advance.</para></listitem>
 144      </varlistentry>
 145
 146      <varlistentry><term>upgrade</term>
 147      <listitem><para><literal>upgrade</literal> is used to install the newest versions of all packages
 148      currently installed on the system from the sources enumerated in
 149      <filename>/etc/apt/sources.list</filename>. Packages currently installed with
 150      new versions available are retrieved and upgraded; under no circumstances
 151      are currently installed packages removed, or packages not already installed
 152      retrieved and installed. New versions of currently installed packages that
 153      cannot be upgraded without changing the install status of another package
 154      will be left at their current version. An <literal>update</literal> must be
 155      performed first so that <command>apt-get</command> knows that new versions of packages are
 156      available.</para></listitem>
 157      </varlistentry>
 158
 159      <varlistentry><term>dselect-upgrade</term>
 160      <listitem><para><literal>dselect-upgrade</literal>
 161      is used in conjunction with the traditional Debian packaging
 162      front-end, &dselect;. <literal>dselect-upgrade</literal>
 163      follows the changes made by &dselect; to the <literal>Status</literal>
 164      field of available packages, and performs the actions necessary to realize
 165      that state (for instance, the removal of old and the installation of new
 166      packages).</para></listitem>
 167      </varlistentry>
 168
 169      <varlistentry><term>dist-upgrade</term>
 170      <listitem><para><literal>dist-upgrade</literal> in addition to performing the function of
 171      <literal>upgrade</literal>, also intelligently handles changing dependencies
 172      with new versions of packages; <command>apt-get</command> has a "smart" conflict
 173      resolution system, and it will attempt to upgrade the most important
 174      packages at the expense of less important ones if necessary.
 175          So, <literal>dist-upgrade</literal> command may remove some packages.
 176      The <filename>/etc/apt/sources.list</filename> file contains a list of locations
 177      from which to retrieve desired package files.
 178      See also &apt-preferences; for a mechanism for
 179      overriding the general settings for individual packages.</para></listitem>
 180      </varlistentry>
 181
 182      <varlistentry><term>install</term>
 183      <listitem>
 184          <para><literal>install</literal> is followed by one or more
 185          packages desired for installation or upgrading.
 186          Each package is a package name, not a fully qualified
 187          filename (for instance, in a Debian GNU/Linux system,
 188          libc6 would be the argument provided, not
 189          <literal>libc6_1.9.6-2.deb</literal>). All packages required
 190          by the package(s) specified for installation will also
 191          be retrieved and installed.
 192          The <filename>/etc/apt/sources.list</filename> file is
 193          used to locate the desired packages. If a hyphen is
 194          appended to the package name (with no intervening space),
 195          the identified package will be removed if it is installed.
 196          Similarly a plus sign can be used to designate a
 197          package to install. These latter features may be used
 198          to override decisions made by apt-get's conflict
 199          resolution system.
 200          </para>
 201
 202      <para>A specific version of a package can be selected for installation by
 203      following the package name with an equals and the version of the package
 204      to select. This will cause that version to be located and selected for
 205      install. Alternatively a specific distribution can be selected by
 206      following the package name with a slash and the version of the
 207      distribution or the Archive name (stable, testing, unstable).</para>
 208
 209      <para>Both of the version selection mechanisms can downgrade packages and must
 210      be used with care.</para>
 211
 212         <para>This is also the target to use if you want to upgrade one or
 213                 more already-installed packages without upgrading every package
 214                 you have on your system. Unlike the "upgrade" target, which
 215                 installs the newest version of all currently installed packages,
 216                 "install" will install the newest version of only the package(s)
 217                 specified. Simply provide the name of the package(s) you wish
 218                 to upgrade, and if a newer version is available, it (and its
 219                 dependencies, as described above) will be downloaded and
 220                 installed.
 221         </para>
 222
 223      <para>Finally, the &apt-preferences; mechanism allows you to
 224      create an alternative installation policy for
 225      individual packages.</para>
 226
 227      <para>If no package matches the given expression and the expression contains one
 228      of '.', '?' or '*' then it is assumed to be a POSIX regular expression,
 229      and it is applied
 230      to all package names in the database. Any matches are then installed (or
 231      removed). Note that matching is done by substring so 'lo.*' matches 'how-lo'
 232      and 'lowest'. If this is undesired, anchor the regular expression
 233      with a '^' or '$' character, or create a more specific regular expression.</para></listitem>
 234      </varlistentry>
 235
 236      <varlistentry><term>remove</term>
 237      <listitem><para><literal>remove</literal> is identical to <literal>install</literal> except that packages are
 238          removed instead of installed. Note the removing a package leaves its
 239          configuration files in system. If a plus sign is appended to the package
 240      name (with no intervening space), the identified package will be
 241      installed instead of removed.</para></listitem>
 242      </varlistentry>
 243
 244      <varlistentry><term>purge</term>
 245      <listitem><para><literal>purge</literal> is identical to <literal>remove</literal> except that packages are
 246      removed and purged (any configuration files are deleted too).</para></listitem>
 247      </varlistentry>
 248
 249      <varlistentry><term>source</term>
 250      <listitem><para><literal>source</literal> causes <command>apt-get</command> to fetch source packages. APT
 251      will examine the available packages to decide which source package to
 252      fetch. It will then find and download into the current directory the
 253      newest available version of that source package while respect the
 254      default release, set with the option <literal>APT::Default-Release</literal>,
 255      the <option>-t</option> option or per package with with the
 256      <literal>pkg/release</literal> syntax, if possible.</para>
 257
 258      <para>Source packages are tracked separately
 259      from binary packages via <literal>deb-src</literal> type lines
 260      in the &sources-list; file. This means that you will need to add such a line
 261      for each repository you want to get sources from. If you don't do this
 262      you will properly get another (newer, older or none) source version than
 263      the one you have installed or could install.</para>
 264
 265      <para>If the <option>--compile</option> options is specified
 266      then the package will be compiled to a binary .deb using
 267      <command>dpkg-buildpackage</command>, if <option>--download-only</option>
 268      is specified then the source package will not be unpacked.</para>
 269
 270      <para>A specific source version can be retrieved by postfixing the source name
 271      with an equals and then the version to fetch, similar to the mechanism
 272      used for the package files. This enables exact matching of the source
 273      package name and version, implicitly enabling the
 274      <literal>APT::Get::Only-Source</literal> option.</para>
 275
 276      <para>Note that source packages are not tracked like binary packages, they
 277      exist only in the current directory and are similar to downloading source
 278      tar balls.</para></listitem>
 279      </varlistentry>
 280
 281      <varlistentry><term>build-dep</term>
 282      <listitem><para><literal>build-dep</literal> causes apt-get to install/remove packages in an
 283      attempt to satisfy the build dependencies for a source package.</para></listitem>
 284      </varlistentry>
 285
 286      <varlistentry><term>check</term>
 287      <listitem><para><literal>check</literal> is a diagnostic tool; it updates the package cache and checks
 288      for broken dependencies.</para></listitem>
 289      </varlistentry>
 290
 291      <varlistentry><term>clean</term>
 292      <listitem><para><literal>clean</literal> clears out the local repository of retrieved package
 293      files. It removes everything but the lock file from
 294      <filename>&cachedir;/archives/</filename> and
 295      <filename>&cachedir;/archives/partial/</filename>. When APT is used as a
 296      &dselect; method, <literal>clean</literal> is run automatically.
 297      Those who do not use dselect will likely want to run <literal>apt-get clean</literal>
 298      from time to time to free up disk space.</para></listitem>
 299      </varlistentry>
 300
 301      <varlistentry><term>autoclean</term>
 302      <listitem><para>Like <literal>clean</literal>, <literal>autoclean</literal> clears out the local
 303      repository of retrieved package files. The difference is that it only
 304      removes package files that can no longer be downloaded, and are largely
 305      useless. This allows a cache to be maintained over a long period without
 306      it growing out of control. The configuration option
 307      <literal>APT::Clean-Installed</literal> will prevent installed packages from being
 308      erased if it is set to off.</para></listitem>
 309      </varlistentry>
 310
 311      <varlistentry><term>autoremove</term>
 312      <listitem><para><literal>autoremove</literal> is used to remove packages that were automatically
 313      installed to satisfy dependencies for some package and that are no more needed.</para></listitem>
 314      </varlistentry>
 315    </variablelist>
 316  </refsect1>
 317
 318  <refsect1><title>options</title>
 319    &apt-cmdblurb;
 320
 321    <variablelist>
 322      <varlistentry><term><option>--no-install-recommends</option></term>
 323      <listitem><para>Do not consider recommended packages as a dependency for installing.
 324      Configuration Item: <literal>APT::Install-Recommends</literal>.</para></listitem>
 325      </varlistentry>
 326
 327      <varlistentry><term><option>-d</option></term><term><option>--download-only</option></term>
 328      <listitem><para>Download only; package files are only retrieved, not unpacked or installed.
 329      Configuration Item: <literal>APT::Get::Download-Only</literal>.</para></listitem>
 330      </varlistentry>
 331
 332      <varlistentry><term><option>-f</option></term><term><option>--fix-broken</option></term>
 333      <listitem><para>Fix; attempt to correct a system with broken dependencies in
 334      place. This option, when used with install/remove, can omit any packages
 335      to permit APT to deduce a likely solution. Any Package that are specified
 336      must completely correct the problem. The option is sometimes necessary when
 337      running APT for the first time; APT itself does not allow broken package
 338      dependencies to exist on a system. It is possible that a system's
 339      dependency structure can be so corrupt as to require manual intervention
 340      (which usually means using &dselect; or <command>dpkg --remove</command> to eliminate some of
 341      the offending packages). Use of this option together with <option>-m</option> may produce an
 342      error in some situations.
 343      Configuration Item: <literal>APT::Get::Fix-Broken</literal>.</para></listitem>
 344      </varlistentry>
 345
 346      <varlistentry><term><option>-m</option></term><term><option>--ignore-missing</option></term>
 347      <term><option>--fix-missing</option></term>
 348      <listitem><para>Ignore missing packages; If packages cannot be retrieved or fail the
 349      integrity check after retrieval (corrupted package files), hold back
 350      those packages and handle the result. Use of this option together with
 351      <option>-f</option> may produce an error in some situations. If a package is
 352      selected for installation (particularly if it is mentioned on the
 353      command line) and it could not be downloaded then it will be silently
 354      held back.
 355      Configuration Item: <literal>APT::Get::Fix-Missing</literal>.</para></listitem>
 356      </varlistentry>
 357
 358      <varlistentry><term><option>--no-download</option></term>
 359      <listitem><para>Disables downloading of packages. This is best used with
 360      <option>--ignore-missing</option> to force APT to use only the .debs it has
 361      already downloaded.
 362      Configuration Item: <literal>APT::Get::Download</literal>.</para></listitem>
 363      </varlistentry>
 364
 365      <varlistentry><term><option>-q</option></term><term><option>--quiet</option></term>
 366      <listitem><para>Quiet; produces output suitable for logging, omitting progress indicators.
 367      More q's will produce more quiet up to a maximum of 2. You can also use
 368      <option>-q=#</option> to set the quiet level, overriding the configuration file.
 369      Note that quiet level 2 implies <option>-y</option>, you should never use -qq
 370      without a no-action modifier such as -d, --print-uris or -s as APT may
 371      decided to do something you did not expect.
 372      Configuration Item: <literal>quiet</literal>.</para></listitem>
 373      </varlistentry>
 374
 375      <varlistentry><term><option>-s</option></term>
 376                    <term><option>--simulate</option></term>
 377                    <term><option>--just-print</option></term>
 378                    <term><option>--dry-run</option></term>
 379                    <term><option>--recon</option></term>
 380                    <term><option>--no-act</option></term>
 381      <listitem><para>No action; perform a simulation of events that would occur but do not
 382      actually change the system.
 383      Configuration Item: <literal>APT::Get::Simulate</literal>.</para>
 384
 385      <para>Simulation run as user will deactivate locking (<literal>Debug::NoLocking</literal>)
 386      automatical. Also a notice will be displayed indicating that this is only a simulation,
 387      if the option <literal>APT::Get::Show-User-Simulation-Note</literal> is set (Default: true)
 388      Neigther NoLocking nor the notice will be triggered if run as root (root should know what
 389      he is doing without further warnings by <literal>apt-get</literal>).</para>
 390
 391      <para>Simulate prints out
 392      a series of lines each one representing a dpkg operation, Configure (Conf),
 393      Remove (Remv), Unpack (Inst). Square brackets indicate broken packages with
 394      and empty set of square brackets meaning breaks that are of no consequence
 395      (rare).</para></listitem>
 396      </varlistentry>
 397
 398      <varlistentry><term><option>-y</option></term><term><option>--yes</option></term>
 399                    <term><option>--assume-yes</option></term>
 400      <listitem><para>Automatic yes to prompts; assume "yes" as answer to all prompts and run
 401      non-interactively. If an undesirable situation, such as changing a held
 402      package, trying to install a unauthenticated package or removing an essential package
 403      occurs then <literal>apt-get</literal> will abort.
 404      Configuration Item: <literal>APT::Get::Assume-Yes</literal>.</para></listitem>
 405      </varlistentry>
 406
 407      <varlistentry><term><option>-u</option></term><term><option>--show-upgraded</option></term>
 408      <listitem><para>Show upgraded packages; Print out a list of all packages that are to be
 409      upgraded.
 410      Configuration Item: <literal>APT::Get::Show-Upgraded</literal>.</para></listitem>
 411      </varlistentry>
 412
 413      <varlistentry><term><option>-V</option></term><term><option>--verbose-versions</option></term>
 414      <listitem><para>Show full versions for upgraded and installed packages.
 415      Configuration Item: <literal>APT::Get::Show-Versions</literal>.</para></listitem>
 416      </varlistentry>
 417
 418      <varlistentry><term><option>-b</option></term><term><option>--compile</option></term>
 419                    <term><option>--build</option></term>
 420      <listitem><para>Compile source packages after downloading them.
 421      Configuration Item: <literal>APT::Get::Compile</literal>.</para></listitem>
 422      </varlistentry>
 423
 424      <varlistentry><term><option>--install-recommends</option></term>
 425      <listitem><para>Also install recommended packages.</para></listitem>
 426      </varlistentry>
 427
 428      <varlistentry><term><option>--no-install-recommends</option></term>
 429      <listitem><para>Do not install recommended packages.</para></listitem>
 430      </varlistentry>
 431
 432      <varlistentry><term><option>--ignore-hold</option></term>
 433      <listitem><para>Ignore package Holds; This causes <command>apt-get</command> to ignore a hold
 434      placed on a package. This may be useful in conjunction with
 435      <literal>dist-upgrade</literal> to override a large number of undesired holds.
 436      Configuration Item: <literal>APT::Ignore-Hold</literal>.</para></listitem>
 437      </varlistentry>
 438
 439      <varlistentry><term><option>--no-upgrade</option></term>
 440      <listitem><para>Do not upgrade packages; When used in conjunction with <literal>install</literal>,
 441      <literal>no-upgrade</literal> will prevent packages on the command line
 442      from being upgraded if they are already installed.
 443      Configuration Item: <literal>APT::Get::Upgrade</literal>.</para></listitem>
 444      </varlistentry>
 445
 446      <varlistentry><term><option>--force-yes</option></term>
 447      <listitem><para>Force yes; This is a dangerous option that will cause apt to continue
 448      without prompting if it is doing something potentially harmful. It
 449      should not be used except in very special situations. Using
 450      <literal>force-yes</literal> can potentially destroy your system!
 451      Configuration Item: <literal>APT::Get::force-yes</literal>.</para></listitem>
 452      </varlistentry>
 453
 454      <varlistentry><term><option>--print-uris</option></term>
 455      <listitem><para>Instead of fetching the files to install their URIs are printed. Each
 456      URI will have the path, the destination file name, the size and the expected
 457      md5 hash. Note that the file name to write to will not always match
 458      the file name on the remote site! This also works with the
 459      <literal>source</literal> and <literal>update</literal> commands. When used with the
 460      <literal>update</literal> command the MD5 and size are not included, and it is
 461      up to the user to decompress any compressed files.
 462      Configuration Item: <literal>APT::Get::Print-URIs</literal>.</para></listitem>
 463      </varlistentry>
 464
 465      <varlistentry><term><option>--purge</option></term>
 466      <listitem><para>Use purge instead of remove for anything that would be removed.
 467      An asterisk ("*") will be displayed next to packages which are
 468          scheduled to be purged. <option>remove --purge</option> is equivalent for
 469          <option>purge</option> command.
 470      Configuration Item: <literal>APT::Get::Purge</literal>.</para></listitem>
 471      </varlistentry>
 472
 473      <varlistentry><term><option>--reinstall</option></term>
 474      <listitem><para>Re-Install packages that are already installed and at the newest version.
 475      Configuration Item: <literal>APT::Get::ReInstall</literal>.</para></listitem>
 476      </varlistentry>
 477
 478      <varlistentry><term><option>--list-cleanup</option></term>
 479      <listitem><para>This option defaults to on, use <literal>--no-list-cleanup</literal> to turn it
 480      off. When on <command>apt-get</command> will automatically manage the contents of
 481      <filename>&statedir;/lists</filename> to ensure that obsolete files are erased.
 482      The only  reason to turn it off is if you frequently change your source
 483      list.
 484      Configuration Item: <literal>APT::Get::List-Cleanup</literal>.</para></listitem>
 485      </varlistentry>
 486
 487      <varlistentry><term><option>-t</option></term>
 488                    <term><option>--target-release</option></term>
 489                    <term><option>--default-release</option></term>
 490      <listitem><para>This option controls the default input to the policy engine, it creates
 491      a default pin at priority 990 using the specified release string.
 492      This overrides the general settings in <filename>/etc/apt/preferences</filename>.
 493      Specifically pinned packages are not affected by the value
 494      of this option. In short, this option
 495      lets you have simple control over which distribution packages will be
 496      retrieved from. Some common examples might be
 497      <option>-t '2.1*'</option>, <option>-t unstable</option>
 498      or <option>-t sid</option>.
 499      Configuration Item: <literal>APT::Default-Release</literal>;
 500      see also the &apt-preferences; manual page.</para></listitem>
 501      </varlistentry>
 502
 503      <varlistentry><term><option>--trivial-only</option></term>
 504      <listitem><para>
 505      Only perform operations that are 'trivial'. Logically this can be considered
 506      related to <option>--assume-yes</option>, where <option>--assume-yes</option> will answer
 507      yes to any prompt, <option>--trivial-only</option> will answer no.
 508      Configuration Item: <literal>APT::Get::Trivial-Only</literal>.</para></listitem>
 509      </varlistentry>
 510
 511      <varlistentry><term><option>--no-remove</option></term>
 512      <listitem><para>If any packages are to be removed apt-get immediately aborts without
 513      prompting.
 514      Configuration Item: <literal>APT::Get::Remove</literal>.</para></listitem>
 515      </varlistentry>
 516
 517      <varlistentry><term><option>--auto-remove</option></term>
 518      <listitem><para>If the command is either <literal>install</literal> or <literal>remove</literal>,
 519      then this option acts like running <literal>autoremove</literal> command, removing the unused
 520      dependency packages. Configuration Item: <literal>APT::Get::AutomaticRemove</literal>.
 521      </para></listitem>
 522      </varlistentry>
 523
 524      <varlistentry><term><option>--only-source</option></term>
 525      <listitem><para>Only has meaning for the
 526      <literal>source</literal> and <literal>build-dep</literal>
 527      commands.  Indicates that the given source names are not to be
 528      mapped through the binary table.  This means that if this option
 529      is specified, these commands will only accept source package
 530      names as arguments, rather than accepting binary package names
 531      and looking up the corresponding source package.  Configuration
 532      Item: <literal>APT::Get::Only-Source</literal>.</para></listitem>
 533      </varlistentry>
 534
 535      <varlistentry><term><option>--diff-only</option></term><term><option>--dsc-only</option></term><term><option>--tar-only</option></term>
 536      <listitem><para>Download only the diff, dsc, or tar file of a source archive.
 537      Configuration Item: <literal>APT::Get::Diff-Only</literal>, <literal>APT::Get::Dsc-Only</literal>, and
 538      <literal>APT::Get::Tar-Only</literal>.</para></listitem>
 539      </varlistentry>
 540
 541      <varlistentry><term><option>--arch-only</option></term>
 542      <listitem><para>Only process architecture-dependent build-dependencies.
 543      Configuration Item: <literal>APT::Get::Arch-Only</literal>.</para></listitem>
 544      </varlistentry>
 545
 546      <varlistentry><term><option>--allow-unauthenticated</option></term>
 547      <listitem><para>Ignore if packages can't be authenticated and don't prompt about it.
 548      This is useful for tools like pbuilder.
 549      Configuration Item: <literal>APT::Get::AllowUnauthenticated</literal>.</para></listitem>
 550      </varlistentry>
 551
 552
 553      &apt-commonoptions;
 554
 555    </variablelist>
 556  </refsect1>
 557
 558  <refsect1><title>Files</title>
 559    <variablelist>
 560      <varlistentry><term><filename>/etc/apt/sources.list</filename></term>
 561      <listitem><para>Locations to fetch packages from.
 562      Configuration Item: <literal>Dir::Etc::SourceList</literal>.</para></listitem>
 563      </varlistentry>
 564
 565      <varlistentry><term><filename>/etc/apt/apt.conf</filename></term>
 566      <listitem><para>APT configuration file.
 567      Configuration Item: <literal>Dir::Etc::Main</literal>.</para></listitem>
 568      </varlistentry>
 569
 570      <varlistentry><term><filename>/etc/apt/apt.conf.d/</filename></term>
 571      <listitem><para>APT configuration file fragments.
 572      Configuration Item: <literal>Dir::Etc::Parts</literal>.</para></listitem>
 573      </varlistentry>
 574
 575      <varlistentry><term><filename>/etc/apt/preferences</filename></term>
 576      <listitem><para>Version preferences file.
 577      This is where you would specify "pinning",
 578      i.e. a preference to get certain packages
 579      from a separate source
 580      or from a different version of a distribution.
 581      Configuration Item: <literal>Dir::Etc::Preferences</literal>.</para></listitem>
 582      </varlistentry>
 583
 584      <varlistentry><term><filename>&cachedir;/archives/</filename></term>
 585      <listitem><para>Storage area for retrieved package files.
 586      Configuration Item: <literal>Dir::Cache::Archives</literal>.</para></listitem>
 587      </varlistentry>
 588
 589      <varlistentry><term><filename>&cachedir;/archives/partial/</filename></term>
 590      <listitem><para>Storage area for package files in transit.
 591      Configuration Item: <literal>Dir::Cache::Archives</literal> (implicit partial). </para></listitem>
 592      </varlistentry>
 593
 594      <varlistentry><term><filename>&statedir;/lists/</filename></term>
 595      <listitem><para>Storage area for state information for each package resource specified in
 596      &sources-list;
 597      Configuration Item: <literal>Dir::State::Lists</literal>.</para></listitem>
 598      </varlistentry>
 599
 600      <varlistentry><term><filename>&statedir;/lists/partial/</filename></term>
 601      <listitem><para> Storage area for state information in transit.
 602      Configuration Item: <literal>Dir::State::Lists</literal> (implicit partial).</para></listitem>
 603      </varlistentry>
 604    </variablelist>
 605  </refsect1>
 606
 607  <refsect1><title>See Also</title>
 608    <para>&apt-cache;, &apt-cdrom;, &dpkg;, &dselect;, &sources-list;,
 609    &apt-conf;, &apt-config;, &apt-secure;,
 610    The APT User's guide in &guidesdir;, &apt-preferences;, the APT Howto.</para>
 611  </refsect1>
 612
 613  <refsect1><title>Diagnostics</title>
 614    <para><command>apt-get</command> returns zero on normal operation, decimal 100 on error.</para>
 615  </refsect1>
 616  <refsect1>
 617          <title>ORIGINAL AUTHORS</title>
 618          <para>&apt-author.jgunthorpe;</para>
 619  </refsect1>
 620  <refsect1>
 621          <title>CURRENT AUTHORS</title>
 622          <para>
 623                  &apt-author.team;
 624          </para>
 625                  &apt-qapage;
 626  </refsect1>
 627  &manbugs;
 628 </refentry>