combine
Perform set operations on lines of two files.
TLDR
Output lines that are in both specified files
$ combine [path/to/file1] and [path/to/file2]
Output lines that are in the first but not in the second file
$ combine [path/to/file1] not [path/to/file2]
Output lines that in are in either of the specified files
$ combine [path/to/file1] or [path/to/file2]
Output lines that are in exactly one of the specified files
$ combine [path/to/file1] xor [path/to/file2]
