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