What needs to work for your Zoom call to work?

It’s amazing how tall the tower of computer abstraction is. Let’s explore a few of those layers here.
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Using a Yubikey as a touchless, magic unlock key for Linux

Yubikeys are great for security, but their benefits decrease somewhat when you leave them in your computer unattended. I also have login passwords that are way too long. How to solve these problems? Use a Yubikey to unlock your computer!
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How does “Send all to voicemail” actually work, anyway?

A look into call forwarding and MMI codes. On my cell provider, you can make calls automatically go to voicemail by dialing a single phone number. But how does this all work, anyway?
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Peeking at user agents for fun and profit

Don’t ignore webserver logs! Even a cursory glance can reveal some really interesting things about the internet.
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Tailscale is Pretty Cool

An automatic mesh network that uses WireGuard under the hood. Why it’s good, and what I use it for.
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Why Have Exposure Notifications Failed?

Exposure notifications, or contact tracing apps, have failed. It’s been months since I wrote my previous post on contact tracing, and yet here’s what I see when I try to download an app.
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We Need to Embrace Exposure Notifications

Google and Apple’s exposure notification technology privacy-preserving, safe, and necessary. We need to embrace it.
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First Look at TeaVM: Java on the Browser?

A young upstart named TeaVM attempts to challenge bloated JavaScript web frameworks. Can it succeed?
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Tracking Down a Fifteen-Hour Email Delay from Outlook & Office 365

TL;DR: Don’t put your mail server behind a CNAME.
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Building Tensorflow + AMD Radeon Open Compute for Ivy Bridge: The Rabbit Hole of CPU Flags and PCIe Features

The story of issue 217 – getting Tensorflow for AMD GPUs to work on an aging Ivy Bridge processor.
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A Tale of Two Servers

Two servers, one IP address. Featuring SNI proxies, SSH, and everyone’s favorite service to self-host: mail!
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