Hi,
We do have an RPM installer, but it is only updated with official releases. If you used the YUM (or APT for Debian based) installer to install 1.6.3 you can use YUM again to auto-update your installation when 1.6.4 is released.
You can find details on the linux installer here:
http://www.evostream.com/downloads/emsd … installers
http://www.evostream.com/evo_evals/EMS% … 0Guide.pdf
Bryan