doc/apt-get.8.xml

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