Answers for "how to display link on index file"

how to link html pages in different folders

<!-- Below this comment is a same folder link -->
<a href="yourfile.html"> same folder</a>
<!-- Below this comment is a link with a parrent folder -->
<a href="../yourfile.html">parrent folder</a>
<!-- Below this comment is a link that you can put the folder directory in -->
<a href="subdir/thefile.html">sub-directory</a>

how link back to home page html without index

<a href="./">Home</a>