/var/www/
|_blog.html
|_blog/
  |_math.html
  |_page2.html
  |_page3.html
  |_(...)

/var/www/
|_index.html (renamed blog.html to index.html)
|_blog/
  |_math.html
  |_page2.html
  |_page3.html
  |_(...)

/var/www/
|_blog/
  |_index.html (renamed from blog.html)
  |_math.html
  |_page2.html
  |_page3.html
  |_(...)