Build a Container from Scratch in Go (Liz Rice GOTO 2018)
by Başar Subaşı
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.
Materials by Başar Subaşı
Başar Subaşı has published 8 tutorials and 7 challenges, and prepared 2 playgrounds.
Featured
Tutorial
Writing a (valid) C program without main()
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.
Linux#c#gcc
Tutorial
Bare-metal programming: Write your first Assembly program
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.
Linux#assembly#x86-64
Tutorial
Linux Processes: Threads & Concurrency
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.
Linux#threads#concurrency
Tutorial
Linux Processes: Understanding Signals
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.
Linux#golang#signals
Challenge
Utilize POSIX Threads for Concurrency
Refactor a slow, single-threaded C file downloader that fetches files sequentially into a multi-threaded program using POSIX Threads (pthreads) to achieve concurrent downloads.
Linux#c#pthreads
Playground
Ubuntu eBPF
Experimental playground with out of the box eBPF support through BTF
LinuxNetworking
All materials
Change Your Root: Chroot Basics
by Başar Subaşı
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.
Using Go for Systems Programming
by Başar Subaşı
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.
Linux Processes: Understanding Signals
by Başar Subaşı
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.
Linux Processes: Threads & Concurrency
by Başar Subaşı
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.
Linux Processes: From a Program to a Process
by Başar Subaşı
Explore what a program is, when it actually becomes a process and how the Linux scheduler manages process execution.
Challenge on Linux
Run a Glibc-incompatible Binary Using chroot
by Başar Subaşı
Export an Alpine container rootfs using crane, set up a chroot environment, and execute a musl-linked binary that fails to run on the host system.
Kill a Stubborn Process with SIGKILL
by Başar Subaşı
A stubborn process is running on the system, kill it :)
Utilize POSIX Threads for Concurrency
by Başar Subaşı
Refactor a slow, single-threaded C file downloader that fetches files sequentially into a multi-threaded program using POSIX Threads (pthreads) to achieve concurrent downloads.
Create a Process from Scratch Using Syscalls
by Başar Subaşı
Write a C program that calls fork() to clone a process and execve() to execute a command, then print and retrieve the child process PID.
Write a C Program Without a main() Function
by Başar Subaşı
Produce a valid ELF binary that runs and exits cleanly, but does not define a main() function.
Count Optimized Assembly Instructions
by Başar Subaşı
Compile a small C loop with -O2 -S, inspect the generated assembly, report how many add instructions gcc produced and see how much it has optimized the equasion.
Linux Processes 101
by Başar Subaşı
Explore Linux kernel task models, process creation with fork() and execve(), multi-threaded concurrency using POSIX threads (pthreads), and asynchronous signal handling and termination.
Bare-Metal Programming 101
by Başar Subaşı
Explore hardware architectures, CPU registers, x86_64 assembly, the C compilation pipeline, linker symbol resolution, and direct system calls in Go to build binaries from the ground up without depending on a standard library.
This playground was created by an iximiuz Labs user and is provided with no warranty.
TCP Proxies: Client, Proxy, and Server
Three Ubuntu VMs for direct TCP connections, byte relaying, and modifying proxies.
This playground was created by an iximiuz Labs user and is provided with no warranty.
Linux Kernel Hacking
Minimal environment for compiling and testing the Linux kernel with GCC, Clang/LLVM, Clangd, and QEMU.
This playground was created by an iximiuz Labs user and is provided with no warranty.
This playground was created by an iximiuz Labs user and is provided with no warranty.
This playground was created by an iximiuz Labs user and is provided with no warranty.