<refentryinfo>
&apt-author.jgunthorpe;
&apt-author.team;
+ <author>
+ <firstname>Daniel</firstname>
+ <surname>Burrows</surname>
+ <contrib>Initial documentation of Debug::*.</contrib>
+ <email>dburrows@debian.org</email>
+ </author>
&apt-email;
&apt-product;
<!-- The last update date -->
- <date>29 February 2004</date>
+ <date>10 December 2008</date>
</refentryinfo>
<refmeta>
parent groups.</para>
<para>Syntactically the configuration language is modeled after what the ISC tools
- such as bind and dhcp use. Lines starting with
- <literal>//</literal> are treated as comments (ignored).
+ such as bind and dhcp use. Lines starting with
+ <literal>//</literal> are treated as comments (ignored), as well as all text
+ between <literal>/*</literal> and <literal>*/</literal>, just like C/C++ comments.
Each line is of the form
<literal>APT::Get::Assume-Yes "true";</literal> The trailing
semicolon is required and the quotes are optional. A new scope can be
</variablelist>
</refsect1>
- <refsect1><title>Debug options</title>
- <para>Most of the options in the <literal>debug</literal> section are not interesting to
- the normal user, however <literal>Debug::pkgProblemResolver</literal> shows
- interesting output about the decisions dist-upgrade makes.
- <literal>Debug::NoLocking</literal> disables file locking so APT can do some
- operations as non-root and <literal>Debug::pkgDPkgPM</literal> will print out the
- command line for each dpkg invokation. <literal>Debug::IdentCdrom</literal> will
- disable the inclusion of statfs data in CDROM IDs.
- <literal>Debug::Acquire::gpgv</literal> Debugging of the gpgv method.
+ <refsect1>
+ <title>Periodic and Archives options</title>
+ <para><literal>APT::Periodic</literal> and <literal>APT::Archives</literal>
+ groups of options configure behavior of apt periodic updates, which is
+ done by <literal>/etc/cron.daily/apt</literal> script. See header of
+ this script for the brief documentation of these options.
</para>
</refsect1>
+
+ <refsect1>
+ <title>Debug options</title>
+ <para>
+ Enabling options in the <literal>Debug::</literal> section will
+ cause debugging information to be sent to the standard error
+ stream of the program utilizing the <literal>apt</literal>
+ libraries, or enable special program modes that are primarily
+ useful for debugging the behavior of <literal>apt</literal>.
+ Most of these options are not interesting to a normal user, but a
+ few may be:
+
+ <itemizedlist>
+ <listitem>
+ <para>
+ <literal>Debug::pkgProblemResolver</literal> enables output
+ about the decisions made by
+ <literal>dist-upgrade, upgrade, install, remove, purge</literal>.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ <literal>Debug::NoLocking</literal> disables all file
+ locking. This can be used to run some operations (for
+ instance, <literal>apt-get -s install</literal>) as a
+ non-root user.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ <literal>Debug::pkgDPkgPM</literal> prints out the actual
+ command line each time that <literal>apt</literal> invokes
+ &dpkg;.
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>
+ <literal>Debug::IdentCdrom</literal> disables the inclusion
+ of statfs data in CDROM IDs. <!-- TODO: provide a
+ motivating example, except I haven't a clue why you'd want
+ to do this. -->
+ </para>
+ </listitem>
+ </itemizedlist>
+ </para>
+
+ <para>
+ A full list of debugging options to apt follows.
+ </para>
+
+ <variablelist>
+ <varlistentry>
+ <term><literal>Debug::Acquire::cdrom</literal></term>
+
+ <listitem>
+ <para>
+ Print information related to accessing
+ <literal>cdrom://</literal> sources.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::Acquire::ftp</literal></term>
+
+ <listitem>
+ <para>
+ Print information related to downloading packages using
+ FTP.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::Acquire::http</literal></term>
+
+ <listitem>
+ <para>
+ Print information related to downloading packages using
+ HTTP.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::Acquire::https</literal></term>
+
+ <listitem>
+ <para>
+ Print information related to downloading packages using
+ HTTPS.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::Acquire::gpgv</literal></term>
+
+ <listitem>
+ <para>
+ Print information related to verifying cryptographic
+ signatures using <literal>gpg</literal>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::aptcdrom</literal></term>
+
+ <listitem>
+ <para>
+ Output information about the process of accessing
+ collections of packages stored on CD-ROMs.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::BuildDeps</literal></term>
+ <listitem>
+ <para>
+ Describes the process of resolving build-dependencies in
+ &apt-get;.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::Hashes</literal></term>
+ <listitem>
+ <para>
+ Output each cryptographic hash that is generated by the
+ <literal>apt</literal> libraries.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::IdentCDROM</literal></term>
+ <listitem>
+ <para>
+ Do not include information from <literal>statfs</literal>,
+ namely the number of used and free blocks on the CD-ROM
+ filesystem, when generating an ID for a CD-ROM.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::NoLocking</literal></term>
+ <listitem>
+ <para>
+ Disable all file locking. For instance, this will allow
+ two instances of <quote><literal>apt-get
+ update</literal></quote> to run at the same time.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgAcquire</literal></term>
+
+ <listitem>
+ <para>
+ Log when items are added to or removed from the global
+ download queue.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgAcquire::Auth</literal></term>
+ <listitem>
+ <para>
+ Output status messages and errors related to verifying
+ checksums and cryptographic signatures of downloaded files.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgAcquire::Diffs</literal></term>
+ <listitem>
+ <para>
+ Output information about downloading and applying package
+ index list diffs, and errors relating to package index list
+ diffs.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgAcquire::RRed</literal></term>
+
+ <listitem>
+ <para>
+ Output information related to patching apt package lists
+ when downloading index diffs instead of full indices.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgAcquire::Worker</literal></term>
+
+ <listitem>
+ <para>
+ Log all interactions with the sub-processes that actually
+ perform downloads.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgAutoRemove</literal></term>
+
+ <listitem>
+ <para>
+ Log events related to the automatically-installed status of
+ packages and to the removal of unused packages.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgDepCache::AutoInstall</literal></term>
+ <listitem>
+ <para>
+ Generate debug messages describing which packages are being
+ automatically installed to resolve dependencies. This
+ corresponds to the initial auto-install pass performed in,
+ e.g., <literal>apt-get install</literal>, and not to the
+ full <literal>apt</literal> dependency resolver; see
+ <literal>Debug::pkgProblemResolver</literal> for that.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <!-- Question: why doesn't this do anything? The code says it should. -->
+ <varlistentry>
+ <term><literal>Debug::pkgInitConfig</literal></term>
+ <listitem>
+ <para>
+ Dump the default configuration to standard output on
+ startup.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgDPkgPM</literal></term>
+ <listitem>
+ <para>
+ When invoking &dpkg;, output the precise command line with
+ which it is being invoked, with arguments separated by a
+ single space character.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgDPkgProgressReporting</literal></term>
+ <listitem>
+ <para>
+ Output all the data received from &dpkg; on the status file
+ descriptor and any errors encountered while parsing it.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgOrderList</literal></term>
+
+ <listitem>
+ <para>
+ Generate a trace of the algorithm that decides the order in
+ which <literal>apt</literal> should pass packages to
+ &dpkg;.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgPackageManager</literal></term>
+
+ <listitem>
+ <para>
+ Output status messages tracing the steps performed when
+ invoking &dpkg;.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgPolicy</literal></term>
+
+ <listitem>
+ <para>
+ Output the priority of each package list on startup.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::pkgProblemResolver</literal></term>
+
+ <listitem>
+ <para>
+ Trace the execution of the dependency resolver (this
+ applies only to what happens when a complex dependency
+ problem is encountered).
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::sourceList</literal></term>
+
+ <listitem>
+ <para>
+ Print information about the vendors read from
+ <filename>/etc/apt/vendors.list</filename>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>Debug::Vendor</literal></term>
+
+ <listitem>
+ <para>
+ Print information about each vendor.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
<refsect1><title>Examples</title>
<para>&configureindex; is a
projects / apt.git / blobdiff