Skip to content

Instantly share code, notes, and snippets.

View jiacai2050's full-sized avatar
:shipit:

Jiacai Liu jiacai2050

:shipit:
View GitHub Profile
@amirrajan
amirrajan / readme.md
Last active July 16, 2025 14:50
Minimal Emacs configuration for Windows and Mac (Vim bindings and leader key)

Here is a minimal setup that works on Windows and Mac (yes I use Emacs on Windows and it works well).

;; using an editor you are comfortable with
;; create c:/Users/USERNAME/AppData/Roaming/.emacs.d/init.el
;; and paste these contents in there:

;; NOTE: depending on how you start up emacs, your home directory may
;;       be different than the one above. Your initialization file 
;;       needs to be saved at ~/.emacs.d/init.el (however that is mapped
@yorickdowne
yorickdowne / friday.md
Last active December 7, 2025 11:46
Debian 13 trixie upgrade

Debian 13

Caution Upgrading from Debian 12 to Debian 13 on machines with mdadm has intermittently failed for me; symptom is that grub EFI is not up to date and system boots into BIOS. Root cause under investigation; it might not be related to mdadm.

To start, read the official release notes.

If your install fits into "vanilla Debian plus maybe a handful of 3rd-party repos", then this guide for a simple upgrade to Debian 13 "trixie" from Debian 12 "bookworm" can be helpful. 3rd-party repos are handled with a find command.

Note upgrade is only supported from Debian 12 to Debian 13. If you are on Debian 11, upgrade to Debian 12 first. Then once on Debian 12, you can upgrade to Debian 13.

@rvrsh3ll
rvrsh3ll / windows-keys.md
Created February 18, 2024 22:44
Windows Product Keys

NOTE

These are NOT product / license keys that are valid for Windows activation.
These keys only select the edition of Windows to install during setup, but they do not activate or license the installation.

Index

@bouroo
bouroo / sse-worker.js
Last active October 6, 2025 11:40
example for cloudflare worker server-sent events
/**
* Cloudflare Worker for Server-Sent Events (SSE)
*
* This worker demonstrates how to set up an SSE endpoint
* that sends an initial message and then periodic updates.
*/
// Listen for incoming requests
addEventListener('fetch', event => {
event.respondWith(handleRequest(event.request));
@kconner
kconner / macOS Internals.md
Last active November 6, 2025 09:43
macOS Internals

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

@sts10
sts10 / rust-command-line-utilities.markdown
Last active December 7, 2025 09:29
A curated list of command-line utilities written in Rust

A curated list of command-line utilities written in Rust

Note: I have moved this list to a proper repository. I'll leave this gist up, but it won't be updated. To submit an idea, open a PR on the repo.

Note that I have not tried all of these personally, and cannot and do not vouch for all of the tools listed here. In most cases, the descriptions here are copied directly from their code repos. Some may have been abandoned. Investigate before installing/using.

The ones I use regularly include: bat, dust, fd, fend, hyperfine, miniserve, ripgrep, just, cargo-audit and cargo-wipe.

  • atuin: "Magical shell history"
  • bandwhich: Terminal bandwidth utilization tool
@LewisGaul
LewisGaul / zig-blog-posts.md
Last active August 10, 2025 13:50
Collection of blog posts about the Zig programming language
@ityonemo
ityonemo / test.md
Last active December 8, 2025 03:51
Zig in 30 minutes

A half-hour to learn Zig

This is inspired by https://fasterthanli.me/blog/2020/a-half-hour-to-learn-rust/

Basics

the command zig run my_code.zig will compile and immediately run your Zig program. Each of these cells contains a zig program that you can try to run (some of them contain compile-time errors that you can comment out to play with)

@payam-int
payam-int / gist:edf977c6af603fee0ce1b05da7792fe7
Last active March 25, 2025 16:18
Prometheus Node Exporter - CPU and Memory Usage

CPU Usage :

(1 - avg(irate(node_cpu_seconds_total{mode="idle"}[10m])) by (instance)) * 100

Memory Usage :

100 * (1 - ((avg_over_time(node_memory_MemFree_bytes[10m]) + avg_over_time(node_memory_Cached_bytes[10m]) + avg_over_time(node_memory_Buffers_bytes[10m])) / avg_over_time(node_memory_MemTotal_bytes[10m])))

I've been working with Apache Kafka for over 7 years. I inevitably find myself doing the same set of activities while I'm developing or working with someone else's system. Here's a set of Kafka productivity hacks for doing a few things way faster than you're probably doing them now. 🔥

Get the tools