Wish you could build your own Linux-based personal video recorder
like the one in Windows Media Center? MythTV does the job,
supporting a number of popular video-capture cards, including HDTV
versions, and remote controls. Installing and configuring MythTV
is not for Linux newbies, however. You can sidestep much of the
process by instead downloading and installing Mythbuntu, a Ubuntu
Linux variant that comes with MythTV preinstalled.
Note: This link takes you to the vendor's site, where you
can read the installation requirements and instructions as well as
download the latest version of the software.