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Glimpse (which stands for GLobal IMPlicit SEarch) is an indexing
and query system that allows you to search through all your
files very quickly. For example, finding 296 lines containing
'whitehouse' in 8750 files occupying 104MB took 6 seconds on a
SUN Sparc 5. Glimpse supports most of agrep's options (agrep is our
powerful version of grep) including approximate matching (e.g.,
finding mis- spelled words), Boolean queries, and even some limited
forms of regular expressions. It is used in the same way, except that
you don't have to specify file names. So, if you are looking for a
needle anywhere in your file system, all you have to do is say
glimpse needle and all lines containing needle will appear preceded
by the file name.
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