loadkeys reads the file specified by filename, and modifies the keyboard streams module's translation tables. If no file is specified, loadkeys loads the file: /usr/share/lib/keytables/type_tt/layout_dd, where tt is
the value returned by the KIOCTYPE ioctl, and dd is the value returned by the KIOCLAYOUT ioctl (see kb(7M)). These keytable files specify only
the entries that change between the specified layout and the default layout for the particular keyboard type. On self-identifying keyboards, the value returned by the KIOCLAYOUT ioctl is set from the DIP switches.
dumpkeys writes the current contents of the keyboard streams module's translation tables, in the format specified by keytables(4), to the standard output.