SL6 x64 Intel Chip - installing & running Fritzing

Depending on what you want Linux for you may want to consider a different distro. It appears Scientific Linux is like Centos (i.e. a copy of RHEL) aimed at stable data center type operations which means their programs and libraries are a few generations behind (on stable versions). Many of the interesting apps (and I don't know if that includes Fritzing or not ) need later more bleeding edge libraries and versions. I used Centos for a while, but finally gave up as I had to load to many packages to new to be in their repository to do what I wanted. I just last night installed the latest Ubuntu desktop as I want to start playing with the Fritzing source and that's what it is developed on. May be a good choice for you as well or may not.