Welcome back to Codects, where I dive into coding projects each week to learn something new or just explore cool tech. This week’s project took me on a journey into the heart of the UNIX operating system: building a Unix shell from scratch using C. The project was both challenging and rewarding, offered me a deeper understanding of how command-line interpreters work. Why Build a UNIX Shell? Building a UNIX shell is like constructing the bridge between the user and the operating system.