On a previous *nix system, I had a little shell script named 'unique' 
(contents shown below the line) that would compile a list of all the 
unique words in a named text file.  But when I tried to use it on my 
current Linux system today, I discovered that I do not have 'deroff' 
which is required for 'unique' to work. 

Is there some other way to compile such a list of unique words; 
or is 'deroff' something that could be downloaded from somewhere? 
I googled for it but couldn't find anything that I could download 
among the 2,000+ hits I got. 

Also, even more to the point ... is there some kind of Linux utility 
that will compile an index of words and their corresponding page 
references within a given text file? 

joe 

-----------------------------------------------------------------
: unique -- to find and list all the unique words in a text file 
# syntax: unique filename (or pipe to a new file) 

deroff -w $1 | sort -uf > word.list

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