

Ages ago when I still bothered with Octoprint, Cura Engine could be installed as a module, and you could slice an STL on a Raspberry Pi through Octoprint. I quickly gave up on that as a stupid gimmick because you pretty much always need to do adjustments in the plater, but once upon a time Cura could do it.

Every slicer I’m aware of runs on Linux. I’ve got PrusaSlicer and slic3r installed right now. Cura is on Flathub. Hell, Simplify3D does or did offer a Linux version, though it was one of those janky .run installers where they translate the Windows install process as literally as possible to Linux.
As for modeling software, depends on what kind of modeling. I tend to use FreeCAD, but it’s mostly suitable for engineering and not art.