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<?xml version="1.0" encoding="utf-8" standalone="no"?>
<!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>
<refentryinfo>
&apt-author.team;
&apt-email;
&apt-product;
<!-- The last update date -->
<date>2017-08-17T00:00:00Z</date>
</refentryinfo>
<refmeta>
<refentrytitle>apt_auth.conf</refentrytitle>
<manvolnum>5</manvolnum>
<refmiscinfo class="manual">APT</refmiscinfo>
</refmeta>
<!-- Man page title -->
<refnamediv>
<refname>apt_auth.conf</refname>
<refpurpose>Login configuration file for APT sources and proxies</refpurpose>
</refnamediv>
<refsect1><title>Description</title>
<para>APT configuration files like &sources-list; or &apt-conf; need to be accessible
for everyone using apt tools on the system to have access to all package-related
information like the available packages in a repository. Login information
needed to connect to a proxy or to download data from a repository on the other
hand shouldn't always be accessible by everyone and can hence not be placed in a
file with world-readable file permissions.</para>
<para>The APT auth.conf file <filename>/etc/apt/auth.conf</filename> can be used to store
login information in a netrc-like format with restrictive file permissions.</para>
</refsect1>
<refsect1><title>netrc-like format</title>
<para>The format defined here is similar to the format of the <filename>~/.netrc</filename>
file used by <citerefentry><refentrytitle><command>ftp</command></refentrytitle><manvolnum>1</manvolnum></citerefentry>
and similar programs interacting with servers.
It is a simple token-based format with the following tokens being recognized;
Unknown tokens will be ignored. Tokens may be separated by spaces, tabs or newlines.</para>
<variablelist>
<varlistentry>
<term><literal>machine</literal> <replaceable>hostname</replaceable>[:<replaceable>port</replaceable>][/<replaceable>path</replaceable>]</term>
<listitem><para>Entries are looked up by searching for the
<emphasis><literal>machine</literal></emphasis> token matching the
hostname of the URI apt needs login information for. Extending the netrc-format
a portnumber can be specified. If no port is given the token matches for all ports.
Similar the path is optional and only needed and useful if multiple repositories with
different login information reside on the same server. A machine token with a path
matches if the path in the URI starts with the path given in the token.
Once a match is made, the subsequent tokens are processed, stopping when the
end of file is reached or another <emphasis><literal>machine</literal></emphasis>
token is encountered.</para></listitem>
</varlistentry>
<varlistentry>
<term><literal>login</literal> <replaceable>name</replaceable></term>
<listitem><para>The username to be used.</para></listitem>
</varlistentry>
<varlistentry>
<term><literal>password</literal> <replaceable>string</replaceable></term>
<listitem><para>The password to be used.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1><title>Example</title>
<para>Supplying login information for a user named <literal>apt</literal>
with the password <literal>debian</literal> for the &sources-list; entry
<literallayout>deb http://example.org/debian &debian-stable-codename; main</literallayout>
could be done in the entry directly:
<literallayout>deb http://apt:debian@example.org/debian &debian-stable-codename; main</literallayout>
Alternatively an entry like the following in the auth.conf file could be used:
<literallayout>machine example.org
login apt
password debian</literallayout>
Or alternatively within a single line:
<literallayout>machine example.org login apt password debian</literallayout>
If you need to be more specific all of these lines will also apply to the example entry:
<literallayout>machine example.org/deb login apt password debian
machine example.org/debian login apt password debian
machine example.org/debian/ login apt password debian
</literallayout>
On the other hand neither of the following lines apply:
<literallayout>machine example.org:80 login apt password debian
machine example.org/deb/ login apt password debian
machine example.org/ubuntu login apt password debian
machine example.orga login apt password debian
machine example.net login apt password debian
</literallayout>
</para>
</refsect1>
<refsect1><title>Notes</title>
<para>Basic support for this feature is present since version 0.7.25, but was
undocumented for years. The documentation was added in version 1.5 changing
also the implementation slightly. For maximum backward compatibility you should
avoid multiple <literal>machine</literal> tokens with the same hostname, but if
you need multiple they should all have a path specified in the
<literal>machine</literal> token.</para>
</refsect1>
<refsect1>
<title>Files</title>
<variablelist>
<varlistentry><term><filename>/etc/apt/auth.conf</filename></term>
<listitem><para>Login information for APT sources and proxies in a netrc-like format.
Configuration Item: <literal>Dir::Etc::netrc</literal>.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>&apt-conf; &sources-list;
</para>
</refsect1>
&manbugs;
</refentry>
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