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

[andrew Black]

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. 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).


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