"DNALinux is a Linux distribution with bioinformatics software pre-installed. We believe that this distro fills an empty niche. Specialized biotech software usually is released as source code only and it's not packaged for easy installation on "mainstream" Linux.
Most scientific software is "author software" and it is not easy to install (that is particulary true for Biotech people). As we told before, all the software is pre-installed. Since the distro works from CD, you don't even have to install the operation system.
Since is a live-CD, no permanent changes can be made to your system (unless you make a hard disk install). It's not easy to apply a security patch to this kind of distros, thats why you shouldn't used under a "raw" (unprotected) Internet conection."