You can open your file in Windows, save it as an .sld and load them on Linux.
Or you can use the .stl format which is supported by Linux. (this will be without colours)
thank you for the reply, currently, I don't have a windows machine, of course, I'm using the .stl as the only viable format to share 3D models between CAD and RoboDK, I was wondering why .step and .iges are not supported in Linux, I would expect the same features between RoboDK in Windows and Linux.
Thank you.
Regards,