text indexing on Linux?

[William Park]

Hi all,

Suppose all your files are text files and contain 10 words max.  What
program would you use to index them based on contents?  That is, given a
set of words, it has to return the name of files that contain those
words.

I know of "updatedb" and "locate", but they index only filenames, not
the content.  For my need, "grep" is still faster than any SQL solution,
but I'm curious as to what is the correct approach.
-- 
William
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