In order for you to play Project Zomboid on Linux with minimal graphics settings, your computer must meet the following requirements
Processor (CPU):
Intel 2.77GHz Quad-core
Ubuntu LTS 16.04/Steam Machine. Requires Libgcc 6 or higherMemory (RAM):
8Gb Ram
Hard Disk Space:
5gig
Video Card:
Dedicated graphics card with 2 GB of RAM minimum, OpenGL 2.1 and GLSL 1.2 support (generally 2012 or newer)
Sound:
FMOD compatible sound card