doc/apt-get.8.xml

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   2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   3   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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   5 <!ENTITY % aptent SYSTEM "apt.ent">
   6 %aptent;
   7
   8 <!ENTITY % aptverbatiment SYSTEM "apt-verbatim.ent">
   9 %aptverbatiment;
  10
  11 <!ENTITY % aptvendor SYSTEM "apt-vendor.ent">
  12 %aptvendor;
  13 ]>
  14
  15 <refentry>
  16
  17  <refentryinfo>
  18    &apt-author.jgunthorpe;
  19    &apt-author.team;
  20    &apt-email;
  21    &apt-product;
  22    <!-- The last update date -->
  23    <date>2012-06-09T00:00:00Z</date>
  24  </refentryinfo>
  25
  26  <refmeta>
  27    <refentrytitle>apt-get</refentrytitle>
  28    <manvolnum>8</manvolnum>
  29    <refmiscinfo class="manual">APT</refmiscinfo>
  30  </refmeta>
  31
  32  <!-- Man page title -->
  33  <refnamediv>
  34     <refname>apt-get</refname>
  35     <refpurpose>APT package handling utility -- command-line interface</refpurpose>
  36  </refnamediv>
  37
  38  &synopsis-command-apt-get;
  39
  40  <refsect1><title>Description</title>
  41    <para><command>apt-get</command> is the command-line tool for handling packages, and may be
  42    considered the user's "back-end" to other tools using the APT
  43    library.  Several "front-end" interfaces exist, such as
  44    &aptitude;, &synaptic; and &wajig;.</para>
  45
  46    <para>Unless the <option>-h</option>, or <option>--help</option> option is given, one of the
  47    commands below must be present.</para>
  48
  49    <variablelist>
  50      <varlistentry><term><option>update</option></term>
  51      <listitem><para><literal>update</literal> is used to resynchronize the package index files from
  52      their sources. The indexes of available packages are fetched from the
  53      location(s) specified in <filename>/etc/apt/sources.list</filename>.
  54      For example, when using a Debian archive, this command retrieves and
  55      scans the <filename>Packages.gz</filename> files, so that information about new
  56      and updated packages is available. An <literal>update</literal> should always be
  57      performed before an <literal>upgrade</literal> or <literal>dist-upgrade</literal>. Please
  58      be aware that the overall progress meter will be incorrect as the size
  59      of the package files cannot be known in advance.</para></listitem>
  60      </varlistentry>
  61
  62      <varlistentry><term><option>upgrade</option></term>
  63      <listitem><para><literal>upgrade</literal> is used to install the newest versions of all packages
  64      currently installed on the system from the sources enumerated in
  65      <filename>/etc/apt/sources.list</filename>. Packages currently installed with
  66      new versions available are retrieved and upgraded; under no circumstances
  67      are currently installed packages removed, or packages not already installed
  68      retrieved and installed. New versions of currently installed packages that
  69      cannot be upgraded without changing the install status of another package
  70      will be left at their current version. An <literal>update</literal> must be
  71      performed first so that <command>apt-get</command> knows that new versions of packages are
  72      available.</para></listitem>
  73      </varlistentry>
  74
  75      <varlistentry><term><option>dist-upgrade</option></term>
  76      <listitem><para><literal>dist-upgrade</literal> in addition to performing the function of
  77      <literal>upgrade</literal>, also intelligently handles changing dependencies
  78      with new versions of packages; <command>apt-get</command> has a "smart" conflict
  79      resolution system, and it will attempt to upgrade the most important
  80      packages at the expense of less important ones if necessary.
  81      The <literal>dist-upgrade</literal> command may therefore remove some packages.
  82      The <filename>/etc/apt/sources.list</filename> file contains a list of locations
  83      from which to retrieve desired package files.
  84      See also &apt-preferences; for a mechanism for
  85      overriding the general settings for individual packages.</para></listitem>
  86      </varlistentry>
  87
  88      <varlistentry><term><option>dselect-upgrade</option></term>
  89      <listitem><para><literal>dselect-upgrade</literal>
  90      is used in conjunction with the traditional Debian packaging
  91      front-end, &dselect;. <literal>dselect-upgrade</literal>
  92      follows the changes made by &dselect; to the <literal>Status</literal>
  93      field of available packages, and performs the actions necessary to realize
  94      that state (for instance, the removal of old and the installation of new
  95      packages).</para></listitem>
  96      </varlistentry>
  97
  98      <varlistentry><term><option>install</option></term>
  99      <listitem>
 100          <para><literal>install</literal> is followed by one or more
 101          packages desired for installation or upgrading.
 102          Each package is a package name, not a fully qualified
 103          filename (for instance, in a Debian system,
 104          <package>apt-utils</package> would be the argument provided, not
 105          <filename>apt-utils_&apt-product-version;_amd64.deb</filename>). All packages required
 106          by the package(s) specified for installation will also
 107          be retrieved and installed.
 108          The <filename>/etc/apt/sources.list</filename> file is
 109          used to locate the desired packages. If a hyphen is
 110          appended to the package name (with no intervening space),
 111          the identified package will be removed if it is installed.
 112          Similarly a plus sign can be used to designate a
 113          package to install. These latter features may be used
 114          to override decisions made by apt-get's conflict
 115          resolution system.
 116          </para>
 117
 118      <para>A specific version of a package can be selected for installation by
 119      following the package name with an equals and the version of the package
 120      to select. This will cause that version to be located and selected for
 121      install. Alternatively a specific distribution can be selected by
 122      following the package name with a slash and the version of the
 123      distribution or the Archive name (stable, testing, unstable).</para>
 124
 125      <para>Both of the version selection mechanisms can downgrade packages and must
 126      be used with care.</para>
 127
 128         <para>This is also the target to use if you want to upgrade one or
 129                 more already-installed packages without upgrading every package
 130                 you have on your system. Unlike the "upgrade" target, which
 131                 installs the newest version of all currently installed packages,
 132                 "install" will install the newest version of only the package(s)
 133                 specified. Simply provide the name of the package(s) you wish
 134                 to upgrade, and if a newer version is available, it (and its
 135                 dependencies, as described above) will be downloaded and
 136                 installed.
 137         </para>
 138
 139      <para>Finally, the &apt-preferences; mechanism allows you to
 140      create an alternative installation policy for
 141      individual packages.</para>
 142
 143      <para>If no package matches the given expression and the expression contains one
 144      of '.', '?' or '*' then it is assumed to be a POSIX regular expression,
 145      and it is applied
 146      to all package names in the database. Any matches are then installed (or
 147      removed). Note that matching is done by substring so 'lo.*' matches 'how-lo'
 148      and 'lowest'. If this is undesired, anchor the regular expression
 149      with a '^' or '$' character, or create a more specific regular expression.</para></listitem>
 150      </varlistentry>
 151
 152      <varlistentry><term><option>remove</option></term>
 153      <listitem><para><literal>remove</literal> is identical to <literal>install</literal> except that packages are
 154          removed instead of installed. Note that removing a package leaves its
 155          configuration files on the system. If a plus sign is appended to the package
 156      name (with no intervening space), the identified package will be
 157      installed instead of removed.</para></listitem>
 158      </varlistentry>
 159
 160      <varlistentry><term><option>purge</option></term>
 161      <listitem><para><literal>purge</literal> is identical to <literal>remove</literal> except that packages are
 162      removed and purged (any configuration files are deleted too).</para></listitem>
 163      </varlistentry>
 164
 165      <varlistentry><term><option>source</option></term>
 166      <listitem><para><literal>source</literal> causes <command>apt-get</command> to fetch source packages. APT
 167      will examine the available packages to decide which source package to
 168      fetch. It will then find and download into the current directory the
 169      newest available version of that source package while respecting the
 170      default release, set with the option <literal>APT::Default-Release</literal>,
 171      the <option>-t</option> option or per package with the
 172      <literal>pkg/release</literal> syntax, if possible.</para>
 173
 174      <para>Source packages are tracked separately
 175      from binary packages via <literal>deb-src</literal> lines
 176      in the &sources-list; file. This means that you will need to add such a line
 177      for each repository you want to get sources from; otherwise you will probably
 178      get either the wrong (too old/too new) source versions or none at all.</para>
 179
 180      <para>If the <option>--compile</option> option is specified
 181      then the package will be compiled to a binary .deb using
 182      <command>dpkg-buildpackage</command> for the architecture as
 183      defined by the <command>--host-architecture</command> option.
 184      If <option>--download-only</option> is specified then the source package
 185      will not be unpacked.</para>
 186
 187      <para>A specific source version can be retrieved by postfixing the source name
 188      with an equals and then the version to fetch, similar to the mechanism
 189      used for the package files. This enables exact matching of the source
 190      package name and version, implicitly enabling the
 191      <literal>APT::Get::Only-Source</literal> option.</para>
 192
 193      <para>Note that source packages are not installed and tracked in the
 194      <command>dpkg</command> database like binary packages; they are simply downloaded
 195      to the current directory, like source tarballs.</para></listitem>
 196      </varlistentry>
 197
 198      <varlistentry><term><option>build-dep</option></term>
 199      <listitem><para><literal>build-dep</literal> causes apt-get to install/remove packages in an
 200      attempt to satisfy the build dependencies for a source package. By default the dependencies are
 201      satisfied to build the package natively. If desired a host-architecture can be specified
 202      with the <option>--host-architecture</option> option instead.</para></listitem>
 203      </varlistentry>
 204
 205      <varlistentry><term><option>check</option></term>
 206      <listitem><para><literal>check</literal> is a diagnostic tool; it updates the package cache and checks
 207      for broken dependencies.</para></listitem>
 208      </varlistentry>
 209
 210      <varlistentry><term><option>download</option></term>
 211        <listitem><para><literal>download</literal> will download the given
 212            binary package into the current directory.
 213        </para></listitem>
 214      </varlistentry>
 215
 216      <varlistentry><term><option>clean</option></term>
 217      <listitem><para><literal>clean</literal> clears out the local repository of retrieved package
 218      files. It removes everything but the lock file from
 219      <filename>&cachedir;/archives/</filename> and
 220      <filename>&cachedir;/archives/partial/</filename>.</para></listitem>
 221      </varlistentry>
 222
 223      <varlistentry><term><option>autoclean</option></term>
 224      <listitem><para>Like <literal>clean</literal>, <literal>autoclean</literal> clears out the local
 225      repository of retrieved package files. The difference is that it only
 226      removes package files that can no longer be downloaded, and are largely
 227      useless. This allows a cache to be maintained over a long period without
 228      it growing out of control. The configuration option
 229      <literal>APT::Clean-Installed</literal> will prevent installed packages from being
 230      erased if it is set to off.</para></listitem>
 231      </varlistentry>
 232
 233      <varlistentry><term><option>autoremove</option></term>
 234      <listitem><para><literal>autoremove</literal> is used to remove packages that were automatically
 235      installed to satisfy dependencies for other packages and are now no longer needed.</para></listitem>
 236      </varlistentry>
 237
 238      <varlistentry><term><option>changelog</option></term>
 239        <listitem><para><literal>changelog</literal> downloads a package changelog and displays
 240            it through <command>sensible-pager</command>. The server name and base
 241            directory is defined in the <literal>APT::Changelogs::Server</literal>
 242            variable (e.g. <ulink url="http://packages.debian.org/changelogs">packages.debian.org/changelogs</ulink> for
 243            Debian or <ulink url="http://changelogs.ubuntu.com/changelogs">changelogs.ubuntu.com/changelogs</ulink> for
 244            Ubuntu).
 245            By default it displays the changelog for the version that is
 246            installed.  However, you can specify the same options as for
 247            the <option>install</option> command.
 248          </para>
 249        </listitem>
 250      </varlistentry>
 251
 252
 253
 254    </variablelist>
 255  </refsect1>
 256
 257  <refsect1><title>options</title>
 258    &apt-cmdblurb;
 259
 260    <variablelist>
 261      <varlistentry><term><option>--no-install-recommends</option></term>
 262      <listitem><para>Do not consider recommended packages as a dependency for installing.
 263      Configuration Item: <literal>APT::Install-Recommends</literal>.</para></listitem>
 264      </varlistentry>
 265
 266      <varlistentry><term><option>--install-suggests</option></term>
 267      <listitem><para>Consider suggested packages as a dependency for installing.
 268      Configuration Item: <literal>APT::Install-Suggests</literal>.</para></listitem>
 269      </varlistentry>
 270
 271      <varlistentry><term><option>-d</option></term><term><option>--download-only</option></term>
 272      <listitem><para>Download only; package files are only retrieved, not unpacked or installed.
 273      Configuration Item: <literal>APT::Get::Download-Only</literal>.</para></listitem>
 274      </varlistentry>
 275
 276      <varlistentry><term><option>-f</option></term><term><option>--fix-broken</option></term>
 277      <listitem><para>Fix; attempt to correct a system with broken dependencies in
 278      place. This option, when used with install/remove, can omit any packages
 279      to permit APT to deduce a likely solution. If packages are specified,
 280      these have to completely correct the problem. The option is sometimes necessary when
 281      running APT for the first time; APT itself does not allow broken package
 282      dependencies to exist on a system. It is possible that a system's
 283      dependency structure can be so corrupt as to require manual intervention
 284      (which usually means using <command>dpkg --remove</command> to eliminate some of
 285      the offending packages). Use of this option together with <option>-m</option> may produce an
 286      error in some situations.
 287      Configuration Item: <literal>APT::Get::Fix-Broken</literal>.</para></listitem>
 288      </varlistentry>
 289
 290      <varlistentry><term><option>-m</option></term><term><option>--ignore-missing</option></term>
 291      <term><option>--fix-missing</option></term>
 292      <listitem><para>Ignore missing packages; if packages cannot be retrieved or fail the
 293      integrity check after retrieval (corrupted package files), hold back
 294      those packages and handle the result. Use of this option together with
 295      <option>-f</option> may produce an error in some situations. If a package is
 296      selected for installation (particularly if it is mentioned on the
 297      command line) and it could not be downloaded then it will be silently
 298      held back.
 299      Configuration Item: <literal>APT::Get::Fix-Missing</literal>.</para></listitem>
 300      </varlistentry>
 301
 302      <varlistentry><term><option>--no-download</option></term>
 303      <listitem><para>Disables downloading of packages. This is best used with
 304      <option>--ignore-missing</option> to force APT to use only the .debs it has
 305      already downloaded.
 306      Configuration Item: <literal>APT::Get::Download</literal>.</para></listitem>
 307      </varlistentry>
 308
 309      <varlistentry><term><option>-q</option></term><term><option>--quiet</option></term>
 310      <listitem><para>Quiet; produces output suitable for logging, omitting progress indicators.
 311      More q's will produce more quiet up to a maximum of 2. You can also use
 312      <option>-q=#</option> to set the quiet level, overriding the configuration file.
 313      Note that quiet level 2 implies <option>-y</option>; you should never use -qq
 314      without a no-action modifier such as -d, --print-uris or -s as APT may
 315      decide to do something you did not expect.
 316      Configuration Item: <literal>quiet</literal>.</para></listitem>
 317      </varlistentry>
 318
 319      <varlistentry><term><option>-s</option></term>
 320                    <term><option>--simulate</option></term>
 321                    <term><option>--just-print</option></term>
 322                    <term><option>--dry-run</option></term>
 323                    <term><option>--recon</option></term>
 324                    <term><option>--no-act</option></term>
 325      <listitem><para>No action; perform a simulation of events that would occur but do not
 326      actually change the system.
 327      Configuration Item: <literal>APT::Get::Simulate</literal>.</para>
 328
 329      <para>Simulated runs performed as a user will automatically deactivate locking
 330      (<literal>Debug::NoLocking</literal>), and if the option
 331      <literal>APT::Get::Show-User-Simulation-Note</literal> is set
 332      (as it is by default) a notice will also be displayed indicating that
 333      this is only a simulation. Runs performed as root do not trigger either
 334      NoLocking or the notice - superusers should know what they are doing
 335      without further warnings from <literal>apt-get</literal>.</para>
 336
 337      <para>Simulated runs print out a series of lines, each representing a <command>dpkg</command>
 338      operation: configure (<literal>Conf</literal>), remove (<literal>Remv</literal>)
 339      or unpack (<literal>Inst</literal>). Square brackets indicate broken packages, and
 340      empty square brackets indicate breaks that are of no consequence (rare).</para></listitem>
 341      </varlistentry>
 342
 343      <varlistentry><term><option>-y</option></term><term><option>--yes</option></term>
 344                    <term><option>--assume-yes</option></term>
 345      <listitem><para>Automatic yes to prompts; assume "yes" as answer to all prompts and run
 346      non-interactively. If an undesirable situation, such as changing a held
 347      package, trying to install a unauthenticated package or removing an essential package
 348      occurs then <literal>apt-get</literal> will abort.
 349      Configuration Item: <literal>APT::Get::Assume-Yes</literal>.</para></listitem>
 350      </varlistentry>
 351
 352      <varlistentry><term><option>--assume-no</option></term>
 353      <listitem><para>Automatic "no" to all prompts.
 354      Configuration Item: <literal>APT::Get::Assume-No</literal>.</para></listitem>
 355      </varlistentry>
 356
 357      <varlistentry><term><option>-u</option></term><term><option>--show-upgraded</option></term>
 358      <listitem><para>Show upgraded packages; print out a list of all packages that are to be
 359      upgraded.
 360      Configuration Item: <literal>APT::Get::Show-Upgraded</literal>.</para></listitem>
 361      </varlistentry>
 362
 363      <varlistentry><term><option>-V</option></term><term><option>--verbose-versions</option></term>
 364      <listitem><para>Show full versions for upgraded and installed packages.
 365      Configuration Item: <literal>APT::Get::Show-Versions</literal>.</para></listitem>
 366      </varlistentry>
 367
 368      <varlistentry><term><option>-a</option></term>
 369                    <term><option>--host-architecture</option></term>
 370      <listitem><para>This option controls the architecture packages are built for
 371      by <command>apt-get source --compile</command> and how cross-builddependencies
 372      are satisfied. By default is it not set which means that the host architecture
 373      is the same as the build architecture (which is defined by <literal>APT::Architecture</literal>).
 374      Configuration Item: <literal>APT::Get::Host-Architecture</literal>
 375      </para></listitem>
 376      </varlistentry>
 377
 378      <varlistentry><term><option>-b</option></term><term><option>--compile</option></term>
 379                    <term><option>--build</option></term>
 380      <listitem><para>Compile source packages after downloading them.
 381      Configuration Item: <literal>APT::Get::Compile</literal>.</para></listitem>
 382      </varlistentry>
 383
 384      <varlistentry><term><option>--ignore-hold</option></term>
 385      <listitem><para>Ignore package holds; this causes <command>apt-get</command> to ignore a hold
 386      placed on a package. This may be useful in conjunction with
 387      <literal>dist-upgrade</literal> to override a large number of undesired holds.
 388      Configuration Item: <literal>APT::Ignore-Hold</literal>.</para></listitem>
 389      </varlistentry>
 390
 391      <varlistentry><term><option>--with-new-pkgs</option></term>
 392      <listitem><para>Allow installing new packages when used in
 393      conjunction with <literal>upgrade</literal>.  This is useful if
 394      the update of a installed package requires new dependencies to be
 395      installed. Instead of holding the package back <literal>upgrade</literal>
 396      will upgrade the package and install the new dependencies. Note that
 397      <literal>upgrade</literal> with this option will never remove packages,
 398      only allow adding new ones.
 399      Configuration Item:  <literal>APT::Get::Upgrade-Allow-New</literal>.
 400      </para></listitem>
 401      </varlistentry>
 402
 403      <varlistentry><term><option>--no-upgrade</option></term>
 404      <listitem><para>Do not upgrade packages; when used in conjunction with <literal>install</literal>,
 405      <literal>no-upgrade</literal> will prevent packages on the command line
 406      from being upgraded if they are already installed.
 407      Configuration Item: <literal>APT::Get::Upgrade</literal>.</para></listitem>
 408      </varlistentry>
 409
 410      <varlistentry><term><option>--only-upgrade</option></term>
 411      <listitem><para>Do not install new packages; when used in conjunction
 412      with <literal>install</literal>, <literal>only-upgrade</literal> will
 413      install upgrades for already installed packages only and ignore requests
 414      to install new packages.
 415      Configuration Item: <literal>APT::Get::Only-Upgrade</literal>.</para></listitem>
 416      </varlistentry>
 417
 418      <varlistentry><term><option>--force-yes</option></term>
 419      <listitem><para>Force yes; this is a dangerous option that will cause apt to continue
 420      without prompting if it is doing something potentially harmful. It
 421      should not be used except in very special situations. Using
 422      <literal>force-yes</literal> can potentially destroy your system!
 423      Configuration Item: <literal>APT::Get::force-yes</literal>.</para></listitem>
 424      </varlistentry>
 425
 426      <varlistentry><term><option>--print-uris</option></term>
 427      <listitem><para>Instead of fetching the files to install their URIs are printed. Each
 428      URI will have the path, the destination file name, the size and the expected
 429      MD5 hash. Note that the file name to write to will not always match
 430      the file name on the remote site! This also works with the
 431      <literal>source</literal> and <literal>update</literal> commands. When used with the
 432      <literal>update</literal> command the MD5 and size are not included, and it is
 433      up to the user to decompress any compressed files.
 434      Configuration Item: <literal>APT::Get::Print-URIs</literal>.</para></listitem>
 435      </varlistentry>
 436
 437      <varlistentry><term><option>--purge</option></term>
 438      <listitem><para>Use purge instead of remove for anything that would be removed.
 439      An asterisk ("*") will be displayed next to packages which are
 440          scheduled to be purged. <option>remove --purge</option> is equivalent to the
 441          <option>purge</option> command.
 442      Configuration Item: <literal>APT::Get::Purge</literal>.</para></listitem>
 443      </varlistentry>
 444
 445      <varlistentry><term><option>--reinstall</option></term>
 446      <listitem><para>Re-install packages that are already installed and at the newest version.
 447      Configuration Item: <literal>APT::Get::ReInstall</literal>.</para></listitem>
 448      </varlistentry>
 449
 450      <varlistentry><term><option>--list-cleanup</option></term>
 451      <listitem><para>This option is on by default; use <literal>--no-list-cleanup</literal> to turn
 452      it off. When it is on, <command>apt-get</command> will automatically manage the contents
 453      of <filename>&statedir;/lists</filename> to ensure that obsolete files are erased.
 454      The only reason to turn it off is if you frequently change your sources list.
 455      Configuration Item: <literal>APT::Get::List-Cleanup</literal>.</para></listitem>
 456      </varlistentry>
 457
 458      <varlistentry><term><option>-t</option></term>
 459                    <term><option>--target-release</option></term>
 460                    <term><option>--default-release</option></term>
 461      <listitem><para>This option controls the default input to the policy engine; it creates
 462      a default pin at priority 990 using the specified release string.
 463      This overrides the general settings in <filename>/etc/apt/preferences</filename>.
 464      Specifically pinned packages are not affected by the value
 465      of this option. In short, this option
 466      lets you have simple control over which distribution packages will be
 467      retrieved from. Some common examples might be
 468      <option>-t '2.1*'</option>, <option>-t unstable</option>
 469      or <option>-t sid</option>.
 470      Configuration Item: <literal>APT::Default-Release</literal>;
 471      see also the &apt-preferences; manual page.</para></listitem>
 472      </varlistentry>
 473
 474      <varlistentry><term><option>--trivial-only</option></term>
 475      <listitem><para>
 476      Only perform operations that are 'trivial'. Logically this can be considered
 477      related to <option>--assume-yes</option>; where <option>--assume-yes</option> will answer
 478      yes to any prompt, <option>--trivial-only</option> will answer no.
 479      Configuration Item: <literal>APT::Get::Trivial-Only</literal>.</para></listitem>
 480      </varlistentry>
 481
 482      <varlistentry><term><option>--no-remove</option></term>
 483      <listitem><para>If any packages are to be removed apt-get immediately aborts without
 484      prompting.
 485      Configuration Item: <literal>APT::Get::Remove</literal>.</para></listitem>
 486      </varlistentry>
 487
 488      <varlistentry><term><option>--auto-remove</option></term>
 489      <listitem><para>If the command is either <literal>install</literal> or <literal>remove</literal>,
 490      then this option acts like running the <literal>autoremove</literal> command, removing unused
 491      dependency packages. Configuration Item: <literal>APT::Get::AutomaticRemove</literal>.
 492      </para></listitem>
 493      </varlistentry>
 494
 495      <varlistentry><term><option>--only-source</option></term>
 496      <listitem><para>Only has meaning for the
 497      <literal>source</literal> and <literal>build-dep</literal>
 498      commands.  Indicates that the given source names are not to be
 499      mapped through the binary table.  This means that if this option
 500      is specified, these commands will only accept source package
 501      names as arguments, rather than accepting binary package names
 502      and looking up the corresponding source package.  Configuration
 503      Item: <literal>APT::Get::Only-Source</literal>.</para></listitem>
 504      </varlistentry>
 505
 506      <varlistentry><term><option>--diff-only</option></term><term><option>--dsc-only</option></term><term><option>--tar-only</option></term>
 507      <listitem><para>Download only the diff, dsc, or tar file of a source archive.
 508      Configuration Item: <literal>APT::Get::Diff-Only</literal>, <literal>APT::Get::Dsc-Only</literal>, and
 509      <literal>APT::Get::Tar-Only</literal>.</para></listitem>
 510      </varlistentry>
 511
 512      <varlistentry><term><option>--arch-only</option></term>
 513      <listitem><para>Only process architecture-dependent build-dependencies.
 514      Configuration Item: <literal>APT::Get::Arch-Only</literal>.</para></listitem>
 515      </varlistentry>
 516
 517      <varlistentry><term><option>--allow-unauthenticated</option></term>
 518      <listitem><para>Ignore if packages can't be authenticated and don't prompt about it.
 519      This is useful for tools like pbuilder.
 520      Configuration Item: <literal>APT::Get::AllowUnauthenticated</literal>.</para></listitem>
 521      </varlistentry>
 522
 523      <varlistentry><term><option>--show-progress</option></term>
 524      <listitem><para>Show user friendly progress information in the
 525      terminal window when packages are installed, upgraded or
 526      removed. For a machine parsable version of this data see
 527      README.progress-reporting in the apt doc directory.
 528      Configuration Item: <literal>DpkgPM::Progress</literal> and <literal>Dpkg::Progress-Fancy</literal>.</para></listitem>
 529      </varlistentry>
 530
 531
 532      &apt-commonoptions;
 533
 534    </variablelist>
 535  </refsect1>
 536
 537  <refsect1><title>Files</title>
 538    <variablelist>
 539      &file-sourceslist;
 540      &file-aptconf;
 541      &file-preferences;
 542      &file-cachearchives;
 543      &file-statelists;
 544    </variablelist>
 545  </refsect1>
 546
 547  <refsect1><title>See Also</title>
 548    <para>&apt-cache;, &apt-cdrom;, &dpkg;, &sources-list;,
 549    &apt-conf;, &apt-config;, &apt-secure;,
 550    The APT User's guide in &guidesdir;, &apt-preferences;, the APT Howto.</para>
 551  </refsect1>
 552
 553  <refsect1><title>Diagnostics</title>
 554    <para><command>apt-get</command> returns zero on normal operation, decimal 100 on error.</para>
 555  </refsect1>
 556  &manbugs;
 557 </refentry>