Three of the four Compute Station types use Linux Kernels under their main operating systems.
Note the Operating Systems shown in the diagram are just the main one used for a particular station type, other are Operating Systems are also possible. For example, using Ubuntu in Mesh Stations and Debian in Home Stations.
As of 2022-12-01 all Linux kernels in Compute Stations are Linux Long Term Release (LTS) kernels.
Official LTS
Kernel
Ubuntu
Openwrt
Armbian
Debian
Support
5.4
Y
Y
Y
Maintenance
5.10
Y
Y
Y
Production
5.15
Y
Y
Y
Testing
The above kernel versions supported globally, your local modular assist might support extra versions.
Current default Ubuntu is 20.04 with Ubuntu 5.10 OEM kernel.
Note 5.10 is NOT an Ubuntu enablement kernel but we are using it on our Ubuntu and Openwrt stations for compatibility across a range of hardware and software.