Comm

comm is a command that compares sorted files and shows differences in up to three columns. The columns represent lines from the first, the second or from both files. The user can select which columns to show.

= Origin =

Provided by the GNU Coreutils: man page

= See Also =
 * sort
 * shuf
 * uniq
 * ptx
 * tsort
 * cmp
 * diff
 * diff3