xv6 is a learning OS Kernel. It completely decribes the basic working of a UNIX based system. This is a reference guide for understanding and adding system calls in the kernel. Here is a complete guide to install Ubuntu. To start off first we must have git on our laptops to clone the official repo of xv6 by MIT. Git install command: sudo apt-get install git Commands to install QEMU (an emulator) and cloning the xv6 repo: sudo apt-get install qemu sudo apt-get install libc6-dev:i386 git clone https://github.com/mit-pdos/xv6-public.git xv6 chmod 700 -R xv6 Test whether xv6 is installed by running the following: cd xv6 make make qemu Congragulations, you've successfully installed xv6 on your computer! Now, a system call is the programmatic way in which a computer program requests a service from the kernel of the operating system it is executed on. A system call is a way for programs to interact with the operating system. Video references to begin with: