Manual Pages
Use 'hg help' (or man hg on unix) of your locally installed Mercurial for help on the version you have installed.
Links to online-versions of the manpages:
man page
URL
hg(1)
hgignore(5)
hgrc(5)
These man pages are also available in html-format in the release tarballs as doc/hg.1.html, doc/hgignore.5.html and doc/hgrc.5.html.