https://www.anhdh.net/en/blog Backend & DevOps engineering notes — deep dives into distributed systems, databases, caching, and the infrastructure that keeps software running at scale. Practical, no-fluff writing for engineers who care about how things actually work. en-US anhdh.cv@gmail.com (Do Hung Anh) anhdh.cv@gmail.com (Do Hung Anh) Tue, 30 Jun 2026 00:00:00 GMT https://www.anhdh.net/en/blog/git-submodules https://www.anhdh.net/en/blog/git-submodules The first time you hit a submodule, it usually shows up as an empty folder that breaks your build. This is the mental model that makes them click — plus the handful of commands and the one rule that saves you from embarrassing yourself in front of the whole team. Tue, 30 Jun 2026 00:00:00 GMT anhdh.cv@gmail.com (Do Hung Anh) gitbeginnerdevops