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What's your "Oh fuck, that actually worked!" Linux moment that made you feel like a wizard? (lemmy.world)

submitted 4 months ago by cm0002@lemmy.world to c/linux@programming.dev

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For me, my high bar that I have yet to beat, was the time I pivoted the running OS (ubuntu) into RAM over SSH so I could unmount and image the boot drive without rebooting and loading a live USB (Which would have required a ticket with my provider to enable IPMI)

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[–] percent@infosec.pub 4 points 4 months ago* (last edited 4 months ago)

I made a custom Linux image to run inside a web browser. No particular distro, just a Linux kernel (compiled with a custom configuration to produce a tiny binary), a shell, and a few small apps.

When reading from the filesystem, it made HTTP requests for each file (+ browser caching), so no need to load a disk image all at once. IIRC, I got the cold boot time down to <1 second (after assets were already cached from a previous load though).

I also got NixOS to run in the browser, but even after stripping out as much as possible, it was still really slow due to systemd. (I'm not a systemd hater, resources are just very limited when running this way.)

I used an x86 emulator called v86. It's a very cool project 🙂