In order for you to play X-Plane 12 on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Varies
Processor (CPU):
Intel Core i3, i5, i7, or i9 CPU with 4 or more cores, or AMD Ryzen 3, 5, 7 or 9.
Memory (RAM):
8 GB RAM
Graphics Card:
A Vulkan 1.3-capable video card from NVIDIA or AMD with at least 2 GB VRAM
Storage:
23 GB available space
In order to play X-Plane 12 on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Varies
Processor (CPU):
Intel Core i5 8600k or Ryzen 5 3500 or better
Memory (RAM):
16 GB RAM
Graphics Card:
A DirectX 12-capable video card from NVIDIA or AMD with at least 4 GB VRAM
Storage:
23 GB available space