<?xml version="1.0" encoding="utf-8" standalone="no"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
- "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
-
-<!ENTITY % aptent SYSTEM "apt.ent">
-%aptent;
-
-<!ENTITY % aptverbatiment SYSTEM "apt-verbatim.ent">
-%aptverbatiment;
-
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+ "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
+<!ENTITY % aptent SYSTEM "apt.ent"> %aptent;
+<!ENTITY % aptverbatiment SYSTEM "apt-verbatim.ent"> %aptverbatiment;
+<!ENTITY % aptvendor SYSTEM "apt-vendor.ent"> %aptvendor;
]>
<refentry>
&apt-email;
&apt-product;
<!-- The last update date -->
- <date>04 February 2011</date>
+ <date>2015-10-27T00:00:00Z</date>
</refentryinfo>
<refmeta>
&synopsis-command-apt-cache;
<refsect1><title>Description</title>
- <para><command>apt-cache</command> performs a variety of operations on APT's package
- cache. <command>apt-cache</command> does not manipulate the state of the system
- but does provide operations to search and generate interesting output
- from the package metadata.</para>
+ <para>
+ <command>apt-cache</command> performs a variety of operations on APT's
+ package cache. <command>apt-cache</command> does not manipulate the
+ state of the system but does provide operations to search and generate
+ interesting output from the package metadata. The metadata is acquired
+ and updated via the 'update' command of e.g. <command>apt-get</command>,
+ so that it can be outdated if the last update is too long ago, but in
+ exchange <command>apt-cache</command> works independently of the
+ availability of the configured sources (e.g. offline).
+ </para>
<para>Unless the <option>-h</option>, or <option>--help</option> option is given, one of the
commands below must be present.</para>
<listitem><para><literal>Pure virtual packages</literal> is the number of packages that exist
only as a virtual package name; that is, packages only "provide" the
virtual package name, and no package actually uses the name. For
- instance, "mail-transport-agent" in the Debian GNU/Linux system is a
+ instance, "mail-transport-agent" in the Debian system is a
pure virtual package; several packages provide "mail-transport-agent",
but there is no package named "mail-transport-agent".</para>
</listitem>
<listitem><para><literal>Single virtual packages</literal> is the number of packages with only
one package providing a particular virtual package. For example, in the
- Debian GNU/Linux system, "X11-text-viewer" is a virtual package, but
+ Debian system, "X11-text-viewer" is a virtual package, but
only one package, xless, provides "X11-text-viewer".</para>
</listitem>
<listitem><para><literal>Mixed virtual packages</literal> is the number of packages that either
provide a particular virtual package or have the virtual package name
- as the package name. For instance, in the Debian GNU/Linux system,
+ as the package name. For instance, in the Debian system,
"debconf" is both an actual package, and provided by the debconf-tiny
package.</para>
</listitem>
</listitem>
<listitem><para><literal>Total distinct</literal> versions is the number of package versions
- found in the cache; this value is therefore at least equal to the
- number of total package names. If more than one distribution (both
- "stable" and "unstable", for instance), is being accessed, this value
+ found in the cache. If more than one distribution is being accessed
+ (for instance, "stable" and "unstable"), this value
can be considerably larger than the number of total package names.</para>
</listitem>
</varlistentry>
<varlistentry><term><option>showsrc</option> <option><replaceable>&synopsis-pkg;</replaceable>…</option></term>
- <listitem><para><literal>showsrc</literal> displays all the source package records that match
- the given package names. All versions are shown, as well as all
- records that declare the name to be a Binary.</para></listitem>
+ <listitem><para><literal>showsrc</literal> displays all the
+ source package records that match the given package names. All
+ versions are shown, as well as all records that declare the name
+ to be a binary package. Use <option>--only-source</option> to
+ display only source package names.
+ </para></listitem>
</varlistentry>
<varlistentry><term><option>dump</option></term>
<varlistentry><term><option>search</option> <option><replaceable>&synopsis-regex;</replaceable>…</option></term>
<listitem><para><literal>search</literal> performs a full text search on all available package
- lists for the POSIX regex pattern given, see
- <citerefentry><refentrytitle><command>regex</command></refentrytitle>
- <manvolnum>7</manvolnum></citerefentry>.
+ lists for the POSIX regex pattern given, see ®ex;.
It searches the package names and the
descriptions for an occurrence of the regular expression and prints out
the package name and the short description, including virtual package
If <option>--full</option> is given
then output identical to <literal>show</literal> is produced for each matched
package, and if <option>--names-only</option> is given then the long description
- is not searched, only the package name is.</para>
+ is not searched, only the package name and provided packages are.</para>
<para>
Separate arguments can be used to specify multiple search patterns that
are and'ed together.</para></listitem>
set the <literal>APT::Cache::GivenOnly</literal> option.</para>
<para>The resulting nodes will have several shapes; normal packages are boxes,
- pure provides are triangles, mixed provides are diamonds,
+ pure virtual packages are triangles, mixed virtual packages are diamonds,
missing packages are hexagons. Orange boxes mean recursion was stopped
- [leaf packages], blue lines are pre-depends, green lines are conflicts.</para>
+ (leaf packages), blue lines are pre-depends, green lines are conflicts.</para>
<para>Caution, dotty cannot graph larger sets of packages.</para></listitem>
</varlistentry>
</varlistentry>
<varlistentry><term><option>-i</option></term><term><option>--important</option></term>
- <listitem><para>Print only important dependencies; for use with unmet and depends. Causes only Depends and
+ <listitem><para>Print only important dependencies; for use with <literal>unmet</literal>
+ and <literal>depends</literal>. Causes only Depends and
Pre-Depends relations to be printed.
Configuration Item: <literal>APT::Cache::Important</literal>.</para></listitem>
</varlistentry>
<term><option>--no-breaks</option></term>
<term><option>--no-replaces</option></term>
<term><option>--no-enhances</option></term>
- <listitem><para>Per default the <literal>depends</literal> and
- <literal>rdepends</literal> print all dependencies. This can be tweaked with
+ <listitem><para>Per default the <command>depends</command> and
+ <command>rdepends</command> print all dependencies. This can be tweaked with
these flags which will omit the specified dependency type.
Configuration Item: <literal>APT::Cache::Show<replaceable>DependencyType</replaceable></literal>
e.g. <literal>APT::Cache::ShowRecommends</literal>.</para></listitem>
</varlistentry>
+
+ <varlistentry><term><option>--implicit</option></term>
+ <listitem><para>Per default <command>depends</command> and <command>rdepends</command>
+ print only dependencies explicitly expressed in the metadata. With this flag
+ it will also show dependencies implicitely added based on the encountered data.
+ A <literal>Conflicts: foo</literal> e.g. expresses implicitely that this package
+ also conflicts with the package foo from any other architecture.
+ Configuration Item: <literal>APT::Cache::ShowImplicit</literal>.
+ </para></listitem>
+ </varlistentry>
+
<varlistentry><term><option>-f</option></term><term><option>--full</option></term>
<listitem><para>Print full package records when searching.
Configuration Item: <literal>APT::Cache::ShowFull</literal>.</para></listitem>
<listitem><para>Print full records for all available versions. This is the
default; to turn it off, use <option>--no-all-versions</option>.
If <option>--no-all-versions</option> is specified, only the candidate version
- will displayed (the one which would be selected for installation).
+ will be displayed (the one which would be selected for installation).
This option is only applicable to the <literal>show</literal> command.
Configuration Item: <literal>APT::Cache::AllVersions</literal>.</para></listitem>
</varlistentry>
</varlistentry>
<varlistentry><term><option>--names-only</option></term><term><option>-n</option></term>
- <listitem><para>Only search on the package names, not the long descriptions.
+ <listitem><para>Only search on the package and provided package names, not the long descriptions.
Configuration Item: <literal>APT::Cache::NamesOnly</literal>.</para></listitem>
</varlistentry>
projects / apt.git / blobdiff