Swish

Swish-e is a fast, flexible, and free open source system for indexing collections of Web pages or other files. Once installed and the files indexed you can type at the command line prompt

$ swish-e -w airplane

This will search within all indexed files for the word 'airplane'. A list of the indexed files that contain the word 'airplane' is returned in seconds. Swish-e also supports boolean operations and phrases.

• swish-e
• How to Index Anything