Commands
comm
[OPTION]… FILE1 FILE2
This command compares two files and prints the results in three-column output–for example,
unique to file 1unique to file2 common lines
The files must be sorted before comm can be used.
Example: To compare the entries in two database files, t1old.db and t1new.db, use
comm t1old.db t1new.db
cmp
OPTIONS… FROM-FILE [TO-FILE]
| -1 | Suppress printing of column 1. |
| -2 | Suppress printing of column 2. |
| -3 | Suppress printing of column 3. |
cmp compares two files and outputs the first byte and line number where they differ.
 | Use cmp, rather than diff, to compare binary files. |
Example: To compare file1.txt and file2.txt, skipping ...
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