• RHEL 6 (End of "production" support Q2 2016):
• RHEL 7 (in RC, end of "production" support est. Q1 2020):
• Ubuntu 12.04 LTS "precise" (Ending Q3 2017):
• Ubuntu 14.04 LTS "trusty" (Ending Q3 2019):
• Debian 7 "wheezy" (current stable)