[Gllug] Finding files in one directory only / diff question.

[Nix]

On Tue, 24 Jan 2006, andrew Black moaned:
> Two related questions
> 1.  Is there a way of finding out which files exists in a directory a but not in b. I want to know about some_subdir/only_in_a
>    a/some_subdir/only_in_a
>    a/some_other_subdir/in_both     b/some_other_subdir/in_both
>                                    b/some_subdir/only_in_b
> 
> 
> One way of doing this is to do a find on both directories.

Something involving find and comm would do the trick. I'll think about
it tomorrow.

>                                                            Which leads me to  my second questions
> 2. Is there an option to diff that will allow me to print out lines that exist in first file only (ignoring lines that are in the
> second file only).

You want `comm -2', not diff.

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