Encapsulating cross-platform functions and isolating OS-specific configs using Nushell.
4 min read
Tags
- 18 writings
- since 2024
Autumn ’25
Summer ’25
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.
7 min read
A brief walkthrough of how select, poll, and epoll are implemented.
6 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.
3 min read
A walkthrough of the five I/O models on Linux, with C and Java implementations.
15 min read
Explore Linux file system architecture through VFS, ext4/XFS, disk structures, kernel tables, inodes, and file descriptors.
4 min read
Spring ’25
A look at Git's data structures — objects, references, and branches. These concepts are the foundation for understanding how Git actually works.
10 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.
8 min read
Compile and install FastFetch on Ubuntu 18.04 manually, including the steps needed to resolve an outdated CMake version.
3 min read
Winter ’24/25
Use VS Code Dev Containers to develop inside Docker, reusing an existing Dockerfile while keeping dependencies isolated and reproducible.
3 min read
Notes from designing an Internet checksum lab, covering parallel summation and incremental checksum updates.
6 min read
Summer ’24
Hands-on with Linux network namespaces, from ip link, ARP, and route basics to connecting namespaces with veth pairs and a Linux bridge.
13 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.
5 min read
An introduction to the Linux operating system, file operations, and permission management
8 min read
Spring ’24
Move an installed WSL distribution to another drive by exporting, unregistering, importing, and restoring the default user.
2 min read
Notes on common Linux commands, shortcuts, and plugins, plus recommended terminals and shells.
7 min read
An introduction to processes and threads
12 min read
Winter ’23/24
How to set up a C/C++ debug environment in VSCode, with a walkthrough of `task.json` and `launch.json` and sample configurations.
6 min read