<simpara
  >&config.OS.NAME; has an interesting package management system
  with a lot of features. Unfortunately the OS core is not
  implemented through packages. There seems to be a fixed relation
  between the release number of the OS and the version of base
  tools. But I found no way to query this version database. And
  there is no facility to verify system files. As far this document
  is concerned, the package system of &config.OS.NAME; is irrelevant.
</simpara> 

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

<simpara
  >The query is straightforward. If the argument to <option>-W</option>
  is not in the current directory, and does not have an absolute path,
  then the <envar>PATH</envar> is automatically searched using
  <application>which</application>.
  I did not find an option or convention that isolates package version
  from package name, though.
</simpara>
<formalpara>
  <title>Source: &config.PRE;/packages/FreeBSD/simple.sh</title>
  <para>
    <programlisting><inlinemediaobject><imageobject><imagedata
      format="linespecific"
      fileref="../../&config.PRE;/packages/FreeBSD/simple.sh"
    /></imageobject></inlinemediaobject></programlisting>
  </para>
</formalpara>
<formalpara>
  <title>Output: &config.OUT;/packages/simple</title>
  <para>
    <programlisting><inlinemediaobject><imageobject><imagedata
      format="linespecific"
      fileref="../../&config.OUT;/packages/simple"
    /></imageobject></inlinemediaobject></programlisting>
  </para>
</formalpara>
