
The installation of fwknop is handled by the perl script "install.pl" that
is bundled with the fwknop sources.  Just run:

# ./install.pl

(as root).  This will result in a functioning fwknop installation on your
Linux system.  If you run the installer as a non-root user, fwknop will be
installed in your home directory (specifically in ~/bin and a few perl
modules in ~/lib).  In this case fwknop can only be used as a knock
client against a knock server on a different system.
