MagicaVoxel is not available for Linux but there are some alternatives that runs on Linux with similar functionality. The best Linux alternative is 3D-Coat. It's not free, so if you're looking for a free alternative, you could try Goxel or VoxelShop. If that doesn't suit you, our users have ranked more than 10 alternatives to MagicaVoxel and five of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to MagicaVoxel are Cubik Studio (Paid) and 3D Slash (Freemium).
Model in a unique cubic style. Start modelization with boxes. Move, rotate and scale cuboids. Apply one or more textures per cube, disable any face, edit UV coordinates and create any character parts without the constraints of voxels.