|Very popular distro because of simple set up and maintenance. Has huge community and a lot of software available.
|Has great package management, tweaker's delight, requires advanced knowledge and time to adminster.
|A popular distribution championed by RedHat, bleeding-edge so be prepared for problems.
|Solid, simple to administer desktop distro.
|Based on either Ubuntu or Debian
|Red Hat Enterprise Server
|Fully supported enterprise OS (of course, support costs money, so RHEL can be expensive). Even the most recent versions of RHEL are based on source code which is often several years old, which is a good thing if you want stability and reliablilty over bleeding-edge capabilities.
|A no-cost enterprise OS built from the mostly same source as RHEL and binary compatible with RHEL. CentOS releases lag only slightly behind RHEL.
|SUSE Enterprise 10
|Fully supported distro from Novell
|Bootable CD/DVD with complete desktop environment
|Tutorials and tools to make a bootable flash drive - can be made persistent so one can save changes
|Damn Small Linux (DSL)
|Very capable 50MB distro boots from business card CD or USB pen drive
|Another independent reconstitution of RHEL, this time by Fermilab, CERN and others (hence the name)
|System Rescue CD
|Bootable CD with all the tools for system rescue/recovery