COMPARE file1 file2 [offset1 [offset2]]

* Compares two files an gives one of these outputs:
  "Files are equal" -> What it says.
  "Files differ at offset X" -> If you have given offset1 and offset2,
         you have to add X to them to get the offset from the start.
  "Different size" -> The smaller file is contained in the bigger file.

eg.     compare myscript myscript.bak
        compare fred barney 10 15