Click on the Mutiny Node and look for the OS field at the top of the panel.



Linux 2.6.15-1.1833fc4smp is our Fedora appliance.


Linux 2.6.32-431.20.3.el6.x8664 is our CentOS appliance.


From version 5.1.12 the kernel is also labeled in the About Panel next to the version.