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Attacking UNIX Systems via CUPS
Hello friends, this is the first of two, possibly three (if and when I have time to finish the Windows research) writeups. We will start with targeting GNU/Lin…
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Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 4,387 posts.
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%CPU utilization is a lie
I deal with a lot of servers at work, and one thing everyone wants to know about their servers is how close they are to being at max utilization. It should be easy, right? Just pull up top or another system monitor tool, look at network, memory and CPU utilization, and whichever one is the highest tells you how close…
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Replacing Kubernetes with systemd (2024)
In this post I go through the journey of overusing Kubernetes and how systemd can actually do most of what I use it for.
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Linux on an 8-bit micro
Dmitry.GR: A successful experiment in running real Linux on an 8-bit AVR.
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The browser's main thread is expensive
What comes to mind when you hear "frontend optimization"? For most of us it's things like reducing network requests, shrinking the bundle,…
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A Love Letter to FreeBSD
I’m still the new person here, learning your ways, stumbling over the occasional quirk, smiling when I find the small touches that make you different. You remind me of what computing felt like before the noise. Before hype cycles and performance theatre. Before every tool needed a plugin system and a logo. You are…
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FreeBSD doesn't have Wi-Fi driver for my old MacBook, so AI built one for me
My old 2016 MacBook Pro has been collecting dust in a cabinet for some time now. The laptop suffers from a “flexgate” problem, and I don’t have any practical use for it. For quite some time, I’ve been thinking about repurposing it as a guinea pig, to play with FreeBSD — an OS that I’d aspired to play with for a long…
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Zig builds are getting faster
Andrew Kelley famously (or infamously, depending on your views) said "the compiler is too damn slow, that's why we have bugs." 1
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Clocks for Software Engineers
If you have a software background and you want to pick up digital design,then one of the first things you need to learn about early on is the conceptof the c...
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Linux touchpad like a Macbook: goal worth pursuing?
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Claude Code Found a Linux Vulnerability Hidden for 23 Years
Claude Code has gotten extremely good at finding security vulnerabilities, and this is only the beginning.
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My business card runs Linux
Dmitry.GR: My business card runs Linux (and Ultrix), yours can too. Details, kits, etc...
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RIP, Harvest
I’ve been a self-employed contractor for about a decade now, and I’m bummed about Harvest .
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The sad state of Linux Wi-Fi
I've been using 802.11 on Linux now for over a decade, and to be honest, it's still a pretty sad experience. It works well enough that I mostly don't care... but when I care, and try to dig deeper, it always ends up in the answer “this is just crap”.
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Stop using gzip
Everytime you download a tar.gz, Zod kills a kitten. Everytime you generate a tar.gz, well, let's keep this family-safe. In 2015, there s...
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I designed my own fast game streaming video codec – PyroWave
Streaming gameplay from one machine to another over a network is a reasonably popular use case these days. These use cases demand very, very low latency. Every millisecond counts here. We need to:
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Does it scale? Who cares (2011)
Web developers the world over are always terminally worried about whether or not their application will scale orders of magnitude without keeling over.
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Unconventional PostgreSQL Optimizations
Creative ideas for speeding up queries in PostgreSQL
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Why choose async/await over threads?
A common refrain is that threads can do everything that async/await can, but simpler. So why would anyone choose async/await?
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Why databases use ordered indexes but programming uses hash tables
I think it is safe to state that hash tables (e.g. maps in Go, dicts in Python, HashMap in Java, etc.) are far more common than ordered data structures such as trees for in-memory data structures. One data point is that in a talk about C++ hash table optimization at Google ( available in Abseil ), the speaker noted…
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Docker operations slowing down on AWS
I’m CC’d on mails when things get slow, but never when things work as expected or are fast…oh well. Like an umpire in baseball, if we are doing our jobs, we are invisible. Subjec…
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Reasons Kubernetes is so complex
Preface Hello friends! It’s been a while. I’ve been finding it very hard to write while holding up a full-time job, and I’ve also been dealing with some very...