The two files are compared. (If file1 is `-', the standard input is used.) Under default options, cmp makes no comment if the files are
the same; if they differ, it announces the byte and line number at which the difference occurred. If one file is an initial subsequence of
the other, that fact is noted.
-l Print the byte number (decimal) and the differing bytes (octal) for each difference.
-s Print nothing for differing files; return codes only.