Comment Re:Amateur Radio? (Score 1) 95
The Linux kernel has/had the ability to create network interfaces for AX.25, NETROM (on top of AX.25) and other protocols besides IPv4/IPv6. Routing of said protocols also was supported.
You could use ethernet adapters, packet modems with KISS serial interfaces, a soundmodem driver, etc. Linux would manage the interfaces, and the same netstat/route/etc. commands you use manage other network connections worked with AX.25 as well.
But relatively few Amateur Radio programs ever offloaded this work to the Linux kernel, instead connecting to relevant communication hardware directly. And depending on the Linux distribution, they may or may not compile these lesser-used modules by default (which can be important depending how a Linux distribution treats secure boot signing).