For example, I can read the manual pages of bash by:
$ man bash
or
$ info bash
But there is also /usr/share/doc/bash which contains other related documents. When I looking into the docs of ECB (emacs code browser), in /usr/share/doc/ecb/html, is there any program find the html for me? For example I can type
$ htmldocs ecb
instead of
$ cd /usr/share/doc/ecb/html
$ firefox ...