In order for you to play Euro Truck Simulator 2 on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Linux Ubuntu 12.04
Processor (CPU):
Quad core CPU 3.3 GHz
Memory (RAM):
8 GB RAM
Graphics Card:
Intel HD 630 or similar (2GB VRAM)
Hard Drive:
25 GB available space (Euro Truck Simulator 2 base game)
In order to play Euro Truck Simulator 2 on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Linux Ubuntu 12.04
Processor (CPU):
Quad core CPU 4.6 GHz
Memory (RAM):
12 GB RAM
Graphics Card:
NVIDIA GeForce GTX 1660 or similar (2 GB VRAM)
Hard Drive:
25 GB available space (Euro Truck Simulator 2 base game)