==== difference between "du -sh * " vs "du -h *" ====
<code>
rajulocal@hogwarts ~/work/github/public
 % ls
address_book/  dotfiles/  exercises/  LICENSE  notes/  nutrition_facts/  playground/  products/  projects/  README.md  sandbox/  scripts/  workshop/

rajulocal@hogwarts ~/work/github/public
 % du -sh * | sort -h | tail
8.0K    scripts
12K     address_book
16K     sandbox
32K     nutrition_facts
32K     products
36K     exercises
156K    workshop
196K    projects
264K    playground
2.6M    notes

rajulocal@hogwarts ~/work/github/public
 % du -h * | sort -h | tail 
196K    projects
208K    playground/yahooquery
236K    notes/dokuwiki/data/pages/public/sotm
264K    playground
284K    notes/dokuwiki/data/pages/public
364K    notes/dokuwiki/data/pages/diary
2.5M    notes/dokuwiki
2.5M    notes/dokuwiki/data
2.5M    notes/dokuwiki/data/pages
2.6M    notes
</code>