fb is a binary file viewer, editor, and manipulator. It can be used as a filter, an interactive browser, or to simply dump a file in either binary, decimal, hexadecimal, or octal and/or characters. Either overwrite bytes in either of the four bases or characters or dump to a file and edit the resulting text file with any text editor, then fb can translate from either of the four bases back into a binary file. In summary, fb is a versatile tool for binary file creation, manipulation, and examination.
