grepping distinct lines from many text files ?

[Chris Pressey]

On Tue, 20 Jan 2004 20:56:21 +0200
Ion-Mihai Tetcu <itetcu at apropo.ro> wrote:

> Hi,
> 
> 
> I know I have done this before, but I don't remember how ;)
> 
> I have a collection of text files in one directory, and each file can
> contain one or more lines of text, of which any of them could also be in
> another file and what I want is to do something like:
> 
> CUCU=`cat /path/do/dir/* | some_filer_program`
> 
> and have in $CUCU the distinct lines from all the files.
> 
> Something like SQL's SELECT DISTINCT FROM ....
> 
> Any pointers ?

man 1 uniq
?

-Chris