32v 1m cmp
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CMP(1) UNIX Programmer's Manual CMP(1)
cmp - compare two files
cmp [ -l ] [ -s ] file1 file2
The two files are compared. (If _f_i_l_e_1 is `-', the standard input is used.) Under default options, _c_m_p 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.
Exit code 0 is returned for identical files, 1 for different files, and 2 for an inaccessible or missing argument.