Deep dives into DevOps and server-side topics, combining theory with hands-on examples. Run every command in an attached remote playground, from your browser or local terminal over SSH — no setup required.
Follow along with Liz Rice's classic GOTO 2018 presentation and build your own container runtime in under 100 lines of Go using Linux namespaces, chroot, and cgroups.
Understand how the chroot system call changes the root directory for a process, learn how dynamic linkers resolve dependencies inside a jail, and see what an isolated process perceives as its filesystem root.
Discover how Go functions under the hood as a modern systems programming language. Learn how Go makes system calls directly, resulting in self-contained binaries that have no libc dependencies.
Explore what a program is, when it actually becomes a process and how the Linux scheduler manages process execution.
Explore what a thread actually is in Linux, how threads relate to processes, how the Linux kernel treats both as tasks (task_struct), and how kernel scheduling enables concurrency.
Explore Linux/Unix signals in Go, how signals act as asynchronous notifications, who can send them, default kernel behaviors, sending signals with kill and Go, graceful signal handling with os/signal, and why SIGKILL cannot be trapped.
Explore what a computer, CPU architecture, and kernel are, learn the history and family of Assembly ISAs, compare CISC vs RISC, and write your first x86_64 assembly "Hello, World!" program.
Walk through the C compilation pipeline: preprocessor, compiler, assembler, and linker. Start with a normal hello world, inspect macros and generated assembly, and end by producing a running binary that has no main() function.
