Hacker News: kevinoid

New comment by kevinoid in "Hospitals and universities repurposing drugs at lower cost"

kevinoid — Fri, 19 Jun 2026 16:09:11 +0000

A significant effect is through opioid receptor activation, as demonstrated by Williams et al. <https://doi.org/10.1038/s41380-019-0503-4> by blocking the receptor with naltrexone, which attenuated the antisuicidality effects.

The Huberman Lab episode Ketamine: Benefits and Risks for Depression, PTSD & Neuroplasticity <https://www.hubermanlab.com/episode/ketamine-benefits-and-ri...> and the referenced journal articles (including the above) have a lot of detail on it.

New comment by kevinoid in "Ask HN: Who wants to be hired? (November 2024)"

kevinoid — Sat, 02 Nov 2024 00:48:28 +0000

Location: Bozeman, MT

Remote: Yes

Willing to relocate: No

Technologies: C#, Python, Node.js, MSSQL, ASP.NET WebForms, ASP.NET Core, JavaScript, OpenAPI, Selenium, REST, XML, XSLT, Git, Docker, Ansible, Debian, Bash, POSIX Shell, and many others.

Résumé/CV: https://kevinlocke.name/resume

Email: kevin@kevinlocke.name

Hi, I'm Kevin. I'm a generalist senior software engineer and consultant with over a decade of experience with a broad range of technologies, roles, and industries. I graduated magna cum laude with a B.S. in C.S. from Cornell, co-founded Digital Engine Software in 2009, joined early-stage fintech startup Quantpost in 2013, and have been developing and consulting independently since 2016 for a variety of clients, particularly in home health care and construction. Recently I've worked on many backend web sites and services (ASP.NET+MSSQL and MEAN Stack), automation, integration, and synchronization (Selenium+C#, Python, PowerShell), and Linux DevOps (Docker, Ansible, Bash) projects, but I particularly enjoy lower-level embedded and systems programming. I'm a free and open-source software proponent and contributor. I'm looking forward to joining a team doing meaningful work, particularly toward a social good, contributing my expertise, and learning and collaborating with other professionals.

New comment by kevinoid in "No more boot loader: Please use the kernel instead"

kevinoid — Mon, 08 Jul 2024 22:39:31 +0000

This approach sounds similar to Petitboot <http://www.kernel.org/pub/linux/kernel/people/geoff/petitboo...> which is a kexec-based bootloader that I used on the Playstation 3 many years ago. Apparently it now targets many other systems and there is a (dead?) fork for Coreboot <https://github.com/ArthurHeymans/petitboot_for_coreboot>.

New comment by kevinoid in "AWS switch from gzip to zstd – about 30% reduction in compressed S3 storage"

kevinoid — Sat, 20 Aug 2022 19:10:17 +0000

zstd 1.3.8 and later also has an rsync-friendly mode (via the --rsyncable command-line option). See https://github.com/facebook/zstd/issues/1155

New comment by kevinoid in "Windows' Undocumented “Emergency Restart”"

kevinoid — Tue, 05 Jul 2022 16:50:02 +0000

Perhaps a closer analog would be halt(8) with the -q (BSD) or -f (Linux) option to avoid calling init(8):

https://man.openbsd.org/halt

https://manpages.debian.org/halt

New comment by kevinoid in "Text consoles and framebuffer consoles in Linux"

kevinoid — Sun, 19 Jun 2022 15:51:32 +0000

It sounds like you may be remembering VBE display modes.[1] I think you can still play with these modes by adding `nomodeset vga=ask` to the kernel parameters[2] if you are booting with BIOS (or UEFI with CSM).

[1]: https://en.wikipedia.org/wiki/VESA_BIOS_Extensions

[2]: https://docs.kernel.org/admin-guide/svga.html

New comment by kevinoid in "Fedora considers deprecating legacy BIOS"

kevinoid — Thu, 21 Apr 2022 16:24:12 +0000

Perhaps this is a good time to ask: I'd like to use UEFI for my qemu+libvirt virtual machines, but I need snapshot support. Since QEMU doesn't support pflash internal snapshots <https://gitlab.com/libvirt/libvirt/-/commit/9e2465834f4bff40...> and libvirt can't revert or delete external snapshots <https://bugzilla.redhat.com/show_bug.cgi?id=1519002>, I don't see a way to achieve this. The issue was discussed on virt-tools in 2017 <https://listman.redhat.com/archives/virt-tools-list/2017-Sep...> and the situation appears to be unchanged. Do others have a workable solution?

New comment by kevinoid in "Windows 11 upgrade tool that bypasses Microsoft´s requirements"

kevinoid — Sat, 06 Nov 2021 16:01:23 +0000

Interesting. If I understand correctly, the "bypass" is https://github.com/coofcookie/Windows11Upgrade/blob/1.0.0/Wi... which is a copy of https://github.com/AveYo/MediaCreationTool.bat/blob/main/MCT... which appears to be intentionally cryptic.

It sets HKLM\SYSTEM\Setup\MoSetup\AllowUpgradesWithUnsupportedTPMOrCPU=1 which is mentioned by Microsoft in https://support.microsoft.com/windows/ways-to-install-window... which seems reasonable.

According to the comment, the rest of the script "uses IFEO to attach to Virtual Disk Service Loader process running during setup, then erases appraiserres.dll [...] it must also do some ping-pong renaming of vdsldr in system32\11" Could anyone explain this in more detail?

Also note, according to https://github.com/AveYo/MediaCreationTool.bat/issues/11 it skips the CPU and TPM checks, but not the Secure Boot checks.

New comment by kevinoid in "There is no 'printf'"

kevinoid — Thu, 21 Oct 2021 23:59:07 +0000

To clarify, gcc -Wall only produces the warning with -std=c89/gnu89 (or GCC < 5 without -std=c99/gnu99). As with clang, it implements the implicit `return 0;` for C99 and later. Example: https://godbolt.org/z/Y7Wx5Y89q

New comment by kevinoid in "RSA/SHA1 signature type disabled by default in OpenSSH"

kevinoid — Tue, 31 Aug 2021 20:57:52 +0000

Agreed. I should have made my post clearer. OpenWrt does not suppport SHA-2 signature hashing or any of the newer key algorithms I mentioned, so you are stuck with RSA+SHA1.

New comment by kevinoid in "RSA/SHA1 signature type disabled by default in OpenSSH"

kevinoid — Tue, 31 Aug 2021 19:18:04 +0000

I've been running with ssh-rsa disabled for a while (with a config based on https://infosec.mozilla.org/guidelines/openssh#modern-openss... ) and it's been pretty smooth. Support for better algorithms is widespread, with a few exceptions (like bazaar.launchpad.net).

One gotcha: OpenWrt does not enable ECDSA by default[1] and only recently enabled support for ed25519 by default.[2][3] It's available in release candidates for 21.02, but not in current stable releases. So if you're running a stable release you'll need to either add `PubkeyAcceptedKeyTypes +ssh-rsa` to your client ssh_config or use a custom build of OpenWrt with DROPBEAR_ECC or DROPBEAR_ECC_FULL enabled.

[1]: https://bugs.openwrt.org/index.php?do=details&task_id=786

[2]: https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=d0...

[3]: https://bugs.openwrt.org/index.php?do=details&task_id=3216&s...

[4]: https://bugs.openwrt.org/index.php?do=details&task_id=3452

New comment by kevinoid in "Getting the maximum of your C compiler, for security"

kevinoid — Tue, 31 Aug 2021 16:24:35 +0000

Great suggestions! One caveat: -fsanitize=pointer-compare and -fsanitize=pointer-subtract have some sharp edges and (last I knew) are not considered production ready by the sanitizers team. For example: https://github.com/google/sanitizers/issues/1324

New comment by kevinoid in "Show HN: Micro HTTP server in 22 lines of C"

kevinoid — Sat, 31 Jul 2021 17:53:43 +0000

It's neat, but I don't believe it is a compliant implementation of HTTP/1.1 (or 1.0). For example, it does not handle percent-encoded characters in the request URI.[1][2]

[1]: https://datatracker.ietf.org/doc/html/rfc7230#section-3.1.1

[2]: https://www.w3.org/Protocols/HTTP/1.0/spec.html#Request-URI

New comment by kevinoid in "Show HN: Micro HTTP server in 22 lines of C"

kevinoid — Sat, 31 Jul 2021 17:39:36 +0000

I agree. As with many things, it's only simple as long as you ignore the complexities. As they say, the devil's in the details.

> this "server" only responds to a simple well formed GET request.

And not even that. The Request-URI in a Simple-Request line (inherited from HTTP/0.9) may contain escape characters. (e.g. `GET /my%20file.txt` to get `my file.txt`) HTTP/1.0 states "The origin server must decode the Request-URI in order to properly interpret the request."[1] This server does not.

Which is not to say that this server isn't interesting. Just that it's not a demonstration of how easy HTTP/1 is to parse.

[1]: https://www.w3.org/Protocols/HTTP/1.0/spec.html#Request-URI

New comment by kevinoid in "Neovim 0.5 is overpowering"

kevinoid — Wed, 26 May 2021 16:24:44 +0000

I still use both, with a shared vimrc. The biggest advantage of neovim for me is support for the clipboard in Wayland.[1] There are workarounds for vim (vim-fakeclip[2] is the best I found) but they have many limitations which can be frustrating.

[1]: https://github.com/vim/vim/issues/5157

[2]: https://github.com/kana/vim-fakeclip

New comment by kevinoid in "Nassim Taleb says Bitcoin is an open Ponzi scheme and a failed currency"

kevinoid — Sat, 24 Apr 2021 18:19:46 +0000

A discussion of Nassim Taleb's tweet of the same sentiment last week: https://news.ycombinator.com/item?id=26840006 (430 comments)

New comment by kevinoid in "The Sisyphean Task of DNS Client Config on Linux"

kevinoid — Thu, 15 Apr 2021 21:21:04 +0000

I agree! As a non-expert, I've also had good luck with NetworkManager, but wouldn't recommend systemd-resolved yet if you use DNSSEC:

https://github.com/systemd/systemd/issues/6490 (fixed in v248)

https://github.com/systemd/systemd/issues/8451

https://github.com/systemd/systemd/issues/9867

https://github.com/systemd/systemd/issues/12388

New comment by kevinoid in "FFmpeg 4.4"

kevinoid — Fri, 09 Apr 2021 15:05:44 +0000

It needs both hardware and driver support. You can check supported formats using vdpauinfo. Nouveau maintains a list of supported formats for different hardware at https://nouveau.freedesktop.org/VideoAcceleration.html (I don't think HEVC is supported by nouveau on any hardware.)

New comment by kevinoid in "Ash (Almquist Shell) Variants"

kevinoid — Sun, 04 Apr 2021 14:48:26 +0000

> Why not just settle on bash, zsh and fish shell?

When Ubuntu and Debian switched from bash to dash for /bin/sh, the stated motivations were mostly performance (particularly during boot) and size:

https://wiki.ubuntu.com/DashAsBinSh#Why_was_this_change_made...

https://lists.debian.org/debian-release/2007/07/msg00027.htm...

https://lwn.net/Articles/343924/

New comment by kevinoid in "Man who thought opening a TXT file is fine thought wrong"

kevinoid — Sat, 03 Apr 2021 12:30:23 +0000

Although it was disabled in Debian bash 2.04-5 on 2000-06-05, it was re-enabled in bash 4.0-5 on 2009-09-13 and is currently enabled. See https://metadata.ftp-master.debian.org/changelogs/main/b/bas...