4 min read
Encapsulating cross-platform functions and isolating OS-specific configs using Nushell.
Tags
- 18 writings
- since 2024
2025
Autumn
Summer
7 min read
How to set true system-wide environment variables on macOS with a simple Launch Agent and shell script, so GUI apps and every shell see them.
6 min read
A brief walkthrough of how select, poll, and epoll are implemented.
3 min read
Fix apt install errors caused by no free space in /var/cache/apt/archives by locating the full partition and using a temporary cache path.
15 min read
A walkthrough of the five I/O models on Linux, with C and Java implementations.
4 min read
Explore Linux file system architecture through VFS, ext4/XFS, disk structures, kernel tables, inodes, and file descriptors.
Spring
10 min read
A look at Git's data structures — objects, references, and branches. These concepts are the foundation for understanding how Git actually works.
8 min read
Ubuntu 18.04's glibc is too old for newer VS Code Remote SSH Server and some Node.js binaries. Run the dev environment in Docker and SSH into it.
3 min read
Compile and install FastFetch on Ubuntu 18.04 manually, including the steps needed to resolve an outdated CMake version.
2024
Winter
3 min read
Use VS Code Dev Containers to develop inside Docker, reusing an existing Dockerfile while keeping dependencies isolated and reproducible.
6 min read
Notes from designing an Internet checksum lab, covering parallel summation and incremental checksum updates.
Summer
13 min read
Hands-on with Linux network namespaces, from ip link, ARP, and route basics to connecting namespaces with veth pairs and a Linux bridge.
5 min read
Shell startup and features, command forms, I/O redirection and pipes, shell variables and quoting, writing and running shell scripts, plus a brief intro to sed and awk.
8 min read
An introduction to the Linux operating system, file operations, and permission management
Spring
2 min read
Move an installed WSL distribution to another drive by exporting, unregistering, importing, and restoring the default user.
7 min read
Notes on common Linux commands, shortcuts, and plugins, plus recommended terminals and shells.
12 min read
An introduction to processes and threads
Winter
6 min read
How to set up a C/C++ debug environment in VSCode, with a walkthrough of `task.json` and `launch.json` and sample configurations.