utility compares two files of any type and writes the results
to the standard output.
is silent if the files are the same; if they differ, the byte
and line number at which the first difference occurred is reported.
Bytes and lines are numbered beginning with one.
The options are as follows:
Print the byte number (decimal) and the differing
byte values (octal) for each difference.
Print nothing for differing files; return exit
The optional arguments
are the byte offsets from the beginning of
respectively, where the comparison will begin.
The offset is decimal by default, but may be expressed as a hexadecimal
or octal value by preceding it with a leading
utility exits with one of the following values:
The files are identical.
The files are different; this includes the case
where one file is identical to the first part of
In the latter case, if the
option has not been specified,
writes to standard error that
was reached in the shorter
file (before any differences were found).