Julia Evans

Category: how a computer thing works

Notes on using a single-person Mastodon server
Behind "Hello World" on Linux
What happens when you press a key in your terminal?
Implementing a toy version of TLS 1.3
How to use undocumented web APIs
Some things about getaddrinfo that surprised me
How to find a domain's authoritative nameservers
How to use dig
How do you tell if a problem is caused by DNS?
Tools to explore BGP
Quadratic algorithms are slow (and hashmaps are fast)
How to look at the stack with gdb
The OSI model doesn't map well to TCP/IP
Why strace doesn't work in Docker
Getting started with shaders: signed distance functions!
"server" is hard to define
How tracking pixels work
How containers work: overlayfs
SQL queries don't start with SELECT
How does gdb call functions?
How do groups work on Linux?
Async IO on Linux: select, poll, and epoll
Weird unix thing: 'cd //'
What happens when you start a process on Linux?
How does gdb work?
Should you be scared of Unix signals?
I conquered thread pools! For today, at least.
Thread pools! How do I use them?
What is "the stack"?
Why Ruby’s Timeout is dangerous (and Thread.raise is terrifying)
Why you should understand (a little) about TCP
How the locate command works (and let's write a faster version in one minute!)
How gzip uses Huffman coding
Diving into concurrency: trying out mutexes and atomics
How does SQLite work? Part 2: btrees! (or: disk seeks are slow don't do them!)
How does SQLite work? Part 1: pages!
How is a binary executable organized? Let's explore it!
What happens if you write a TCP stack in Python?
Diving into HDFS
Three steps to learning GDB