SocketCAN

SocketCAN is the normal Linux interface for CAN devices and virtual CAN interfaces.

For local smoke testing, use vcan0 where possible. For real machinery, use the correct interface, bitrate, termination, and safety procedure.

Typical setup outside this book:

sudo modprobe vcan
sudo ip link add dev vcan0 type vcan
sudo ip link set up vcan0

Real machine warning: never attach experimental software to a working machine without a safe test plan, isolation, and permission from the equipment owner.