Since I made a post about installing rtorrent on centos 5.6, I thought that I'd do that for Centos 6 as well. Anyway, Centos 6 comes with many updated packages which makes it possible for us to install the latest libTorrent and rTorrent packages (0.12.9 and 0.8.9 at the time of writing) without having to mess with compilation tools and libraries on the system.