There are two different kinds of search on Dreamwidth installations. When it comes to test or development environments, they are optional. All of them require further setup in addition to a basic Dreamwidth install.
All of the search types are referred to from the tools/search page: http://www.dreamwidth.org/tools/search
UserSearch searches for users matching certain characteristics. It's also known as Directory Search, as well as Community Search (which does the same thing, but limits the results found to communities instead of individual users).
UserSearch is exposed at:
- ...as well as the search widget on the right-hand side of the nav strip.
Instructions for setup can be found in Search/UserSearch.
Sphinx searches through entries, as well as comments (on journals of paid users only). Sphinx is also behind support search, though this is kept in a separate search index from that of the main site.
Sphinx is exposed at
More details and setup instructions can be found in Search/Sphinx.