Funny that you should mention the FHS. From that same document:<p><i>Applications must never create or require special files or subdirectories in the root directory. Other locations in the FHS hierarchy provide more than enough flexibility for any package.</i><p>They really should be using &#x2F;opt:<p><i>&#x2F;opt is reserved for the installation of add-on application software packages.<p>A package to be installed in &#x2F;opt must locate its static files in a separate &#x2F;opt&#x2F;&lt;package&gt; or &#x2F;opt&#x2F;&lt;provider&gt; directory tree</i>