How do I install the Synergy keyboard sharing program on Hardy Heron Linux?

I just installed Hardy Heron, Ubuntu’s new version of Linux, on one of my computers.

This computer has the keyboard and mouse.  I need to install the Synergy keyboard and mouse sharing program on this machine.

I have never used Linux before.  I don’t know how to install a program of any kind in any way on Linux.

Accordingly I ask the general public: How do I install Synergy on Ubuntu Hardy Heron?

Incidentally, I saw  two herons the other day on the way to work.

I suppose I will also be wanting instructions on how to install SL under Linux.