Rico's Nerd Cluster

「离开世界之前 一切都是过程」

Git and VCS

Gitalk, CI/CD, vcstools

Gitalk Gitalk is a free, open-source commenting system that uses GitHub issues for comment storage. It’s an excellent option for developers hosting websites on platforms like GitHub Pages. Cre...

Git and VCS

Gitalk, CI/CD, vcstools

Gitalk Gitalk is a free, open-source commenting system that uses GitHub issues for comment storage. It’s an excellent option for developers hosting websites on platforms like GitHub Pages. Cre...

Google Drive

Shortcuts

Shortcuts Make fonts larger: ctrl-shift-.

VSCode

Debugging ROS2 Projects, Remote SSH, Latex Support, Agentic Workflows

Useful Shortcuts Debugger; F11: step into; Shift f11: step out F5 continue F10: step over ctrl-shift-y to open debug console Set Up VSCode For ROS2 Development In Docker Reference T...

Docker - Docker Basics

What is Docker, Basic Docker Operations, Docker Run, Docker Cp

What Is Docker? Deploying and updating software across different operating systems can be cumbersome. Docker simplifies this by providing an isolated environment that runs independently of the hos...

Cyber Security - How SSL Works

nftables

what happens when you visit https://example.com (and why) HTTPS is secure because of TLS (formerly SSL). HTTPS = HTTP + TLS. SSL stands for Secure Sockets Layer. TLS is Transport Layer Security ...

Linux - Networking 2 UDP Traffic Profiling

nftables

Loopback Traffic When profiling communication-heavy systems (e.g., DDS / ROS 2 workloads), it’s common to look at loopback (lo) traffic to understand inter-process communication on a single host. ...

Linux - Process Signals SIGINT, SIGTERM, SIGKILL, SIGQUIT, and SIGTSTP Explained

NIC

Signal Number Description Keyboard How it’s sent / Source Handling / Behavior SIGINT 2 Interactive interrupt Ctr...

Linux - Networking

NIC

Networking Layers: From DDS Payload to Wire Format When we talk about “sending a DDS message,” it’s easy to think of it as a single thing moving across the system. In reality, networking is layere...

Linux - Power Loss Meltdown

initramfs

🚑 What broke Sudden power-loss left the system in an inconsistent state. (while /roota was being modified) First boot stopped in BusyBox with ALERT! UUI...