ndiff -V (return code: 2)
/usr/bin/ndiff: option --version not recognized Try '/usr/bin/ndiff -h' for help.
ndiff --help (return code: 0)
Usage: /usr/bin/ndiff [option] FILE1 FILE2 Compare two Nmap XML files and display a list of their differences. Differences include host state changes, port state changes, and changes to service and OS detection. -h, --help display this help -v, --verbose also show hosts and ports that haven't changed. --text display output in text format (default) --xml display output in XML format