Debian is my Gnu/linux distribution of choice, and the platform I have used for the majority of time whilst developing openmolar.
Consequently, it should come as no surprise that installation on this platform is well supported (and hopefully painless!).
add the following lines to /etc/apt/sources.list.
deb http://openmolar.com/debian unstable main deb-src http://openmolar.com/debian unstable main
get my key, and add it to apt
wget http://www.openmolar.com/rowinggolfer.gpg.key apt-key add rowinggolfer.gpg.keythen install
apt-get update apt-get install openmolar