[Gllug] Command-line tools for comparing lists

[Tethys]

Tom Schutzer-Weissmann writes:

>I'm looking for command-line tools for comparing lists. For example, to
>find all the lines in a file that also appear in another file, or don't
>appear in another file. Are there some well-established ones, or do
>people just use a bit of Perl / Python / their own poison?

comm(1)

Tet
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