@lucifargundam No, it's Linux in Minecraft. This is a RISC-V simulator, it basically a VM implemented in Java where you can run any os as long as it has the risc-v ISA.

The PC uses x86 and mostly amd64 in recent years, where RISC-v is a simple ISA compared to x86. For example, you can do fancy vector calculations in x86 using only hardware (aka your expensive intel/amd CPU), whereas RISC-v only gives you basic operations (like add, minus, multiply, etc.), and the software needs to figure out how to do fancy tasks. This makes RSIC-V chips easier to build and cheaper to make, like ARM chips used massively in smartphones. But unlike ARM, owned by a company and you need to pay them in order to use it, the RISC-V standard is open-sourced and can be used by anyone for free.

Since RISC-V is simple to simulate, someone writes a mod that allows you to run Linux in Minecraft, without using any hardware virtualization, like VMWare or qemu or kvm.