Bytes and lines are numbered beginning with one.
The following options are available:
The optional arguments skip1 and skip2 are the byte offsets from the beginning of file1 and file2 , respectively, where the comparison will begin. The offset is decimal by default, but may be expressed as an hexadecimal or octal value by preceding it with a leading ``0x'' or ``0''.
The cmp utility exits with one of the following values:
0 The files are identical. 1 The files are different; this includes the case where one file is identical to the first part of the other. In the latter case, if the option has not been specified, cmp writes to standard output that EOF was reached in the shorter file (before any differences were found). >1 An error occurred.