<simpara>
  &config.UNAME; uses checksums based on
  <citerefentry>
    <refentrytitle>sum</refentrytitle>
    <manvolnum>1</manvolnum>
  </citerefentry>.
  <citerefentry>
    <refentrytitle>pkgchk</refentrytitle>
    <manvolnum>1</manvolnum>
  </citerefentry> lets you verify everything, complete packages or
  a list of files specified with option
  <option>-i <replaceable>listfile</replaceable></option>.
  Diagnostics are written to stderr and no news is good news.
</simpara>

<formalpara>
  <title>Command: &config.PRE;/packages/SunOS/verify.sh</title> 
  <para> 
    <programlisting><inlinemediaobject><imageobject><imagedata
      format="linespecific"
      fileref="../../&config.PRE;/packages/SunOS/verify.sh"
    /></imageobject></inlinemediaobject></programlisting>
  </para>
</formalpara>
<formalpara>
  <title>Output: &config.OUT;/packages/verify</title> 
  <para> 
    <programlisting><inlinemediaobject><imageobject><imagedata
      format="linespecific"
      fileref="../../&config.OUT;/packages/verify"
    /></imageobject></inlinemediaobject></programlisting>
  </para>
</formalpara>

<simpara>
  Option <option>-n</option> is advertised as
  <quote>Do not check volatile or editable files</quote>.
  With option 
  <option>-d <replaceable>package_file</replaceable></option>
  you can verify against the checksums included in a package file,
  e.g. on the installation CD.
</simpara>
