PCMark is not available for Linux but there are some alternatives that runs on Linux with similar functionality. The most popular Linux alternative is 
UNIGINE Benchmarks, which is free. If that doesn't suit you, our users have ranked 14 alternatives to PCMark and five of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to PCMark are 
Geekbench (Paid), 
Phoronix Test Suite (Free, Open Source), 
Tyler's Frame Machine (Free) and 
Linpack Xtreme (Free).
PCMark is an industry standard benchmark for Windows PCs and Android devices. If you're looking for more info about PCMark like screenshots, reviews and comments you should visit our info page about it. Below you find the best alternatives.
UNIGINE benchmarks can be effectively used to determine the stability of a GPU under extremely stressful conditions, as well as check the cooling system's potential under maximum heat output. UNIGINE benchmarks includes: Valley The forest-covered valley surrounded by vast mountains amazes with its scale from a bird’s-eye view and is extremely detailed down to every leaf and flower petal.
Geekbench provides a comprehensive set of benchmarks engineered to quickly and accurately measure processor and memory performance. Designed to make benchmarks easy to run and easy to understand, Geekbench takes the guesswork out of producing robust and reliable benchmark results.
The Phoronix Test Suite carry out automated tests. It is open source. It has access to more than 450 test profiles and over 100 test suites. These tests range from battery power consumption monitoring for mobile devices to multi-threaded ray-tracing benchmarks and span the CPU, graphics, system memory, disk storage, and motherboard components.
Tyler’s Frame Machine is a simple, free, educational, small, cross-platform, and portable tool for testing, benchmarking, calibration, framerate comparison, and demonstration. With TFM, you can test and benchmark anything. TFM supports OpenGL, WebGL, DirectX 11, DirectX 12, Metal, and most importantly, Vulkan! https://tylemagne.github.io/TFM
Linpack is a benchmark and the most aggressive stress testing software available today. Best used to test stability of overclocked PCs. Linpack tends to crash unstable PCs in a shorter period of time compared to other stress testing applications.
