+ <varlistentry><term><option>edit-sources</option></term>
+ <listitem><para><literal>edit-sources</literal> lets you edit
+ your sources.list file and provides basic sanity checks.
+ </para></listitem>
+ </varlistentry>
+
+ <varlistentry><term><option>update</option></term>
+ <listitem><para><literal>update</literal> is used to
+ resynchronize the package index files from their sources.
+ </para></listitem>
+ </varlistentry>
+
+ <varlistentry><term><option>upgrade</option></term>
+ <listitem><para><literal>upgrade</literal> is used to install the
+ newest versions of all packages currently installed on the system
+ from the sources enumerated in
+ <filename>/etc/apt/sources.list</filename>. New package will be
+ installed, but existing package will never removed.
+ </para></listitem>
+ </varlistentry>
+
+ <varlistentry><term><option>full-upgrade</option></term>
+ <listitem><para><literal>full-upgrade</literal> performs the
+ function of upgrade but may also remove installed packages
+ if that is required in order to resolve a package conflict.
+ </para></listitem>
+ </varlistentry>
+
+