news.ycombinator.com
Man tar why we use -fhttps://news.ycombinator.com/item?id=47995364Device selection and switching -f, --file=ARCHIVE Use archive file or device ARCHIVE. If this option is not given, tar will first examine the environment variable ‘TAPE'. If it is set, its value will be used as the archive name. Otherwise, tar will assume the compiled-in default. The default value can be inspected either using the --show-defaults option, or at the end of the tar --help output. An archive name that has a colon in it specifies a file or device on a remote machine. The part before the colon is taken as the machine name or IP address, and the part after it as the file or device pathname, e.g.: --file=remotehost:/dev/sr0 An optional username can be prefixed to the hostname, placing a @ sign between them. By default, the remote host is accessed via the rsh(1) command. Nowadays it is common to use ssh(1) instead. You can do so by giving the following command line option: --rsh-command=/usr/bin/ssh The remote machine should have the rmt(8) command installed. If its pathname doMay 3, 2026 10:06 AM
mljar.com
Show HN: Mljar Studio – local AI data analyst that saves analysis as notebookshttps://mljar.com/Hi HN,I’ve been working on mljar-supervised (open-source AutoML for tabular data) for a few years. Recently I built a desktop app around it called MLJAR Studio.The idea is simple: you talk to your data in natural language, the AI generates Python code, executes it locally, and the whole conversation becomes a reproducible notebook (*.ipynb file). So instead of just chatting with data, you end up with something you can inspect, modify, and rerun.What MLJAR Studio does:- Sets up a local Python environment automatically, runs on Mac, Windows, and Linux- Installs missing packages during the conversation- Built-in AutoML for tabular data (classification, regression, multiclass)- Works with standard Python libraries (pandas, matplotlib, etc.)- Works with any data file: CSV, Excel, Stata, Parquet ...- Connects to PostgreSQL, MySQL, SQL Server, Snowflake, Databricks, and Supabase.For AI: use Ollama locally (zero data egress), bring your own OpenAI key, or use MLJAR AI add-on.I built this becauMay 2, 2026 10:21 AM
github.com
Show HN: Manage Casio G-Shock watches from the browserhttps://github.com/izivkov/gshock-smart-sync-webappI've been maintaining GShockSmartSync (Android) for a while, and a recurring ask was "can I do this without installing an app?" So I built a browser-based version using the Web Bluetooth API.What it does: - Time sync with NTP (atomic-clock precision) - Full alarm management (all 5 alarms) - Reminders/events with labels - Watch settings (illumination, sound, display) - Battery level monitoring - Zero install, zero accounts — all BLE traffic stays local between your browser and the watchTech: Next.js + TypeScript, Web Bluetooth API, Material Design 3. Supports 19+ G-Shock models with per-model capability detection.Live demo: https://gshock.avmedia.org Source: https://github.com/izivkov/gshock-smart-sync-webappCan be self-hosted on a Raspberry Pi or any Node-capable server.Browser support: Chrome/Edge/Opera (desktop & Android). iOS needs Bluefy or WebBLE. Safari and Firefox don't support Web Bluetooth — that's a vendor decision, not a fixable limitation on my end.One honest limitation: WeMay 2, 2026 9:48 AM
longevity-tools.com
Show HN: I built Male Hormone Lab Interpreter that does what LLMs can'thttps://www.longevity-tools.com/male-hormones-interpreterHi,My name is Zsolt. I build clinical tools for labs and longevity clinics, and I release some of them as free public tools.The Male Hormone Lab Interpreter unique feature is that it visualizes the testosterone production and feedback pathway on HPG axis to identify the true root cause of hormonal imbalances. All hormones are interpreted based on optimal ranges. This is something LLMs still struggles with.The only difference between public and clinical ones is that the clinical suggest diagnosis and treatment options. But if there is any type of disfunction its obvious from the diagram and differentiating is also straigh forward.All the tools on the longevity-tools.com are 100% free and private. No email or any data collection, no third party scripts, no tracking scripts. Full privacy.Check out my other tools:## Thyroid Function Interpreter https://longevity-tools.com/thyroid-function-interpreterVisualizes hormones, calculated sensitivities, and secretory capacities on the HPT axis so May 2, 2026 9:12 AM
iesna.eu
Show HN: Browser-based light pollution simulator using real photometric datahttps://iesna.eu/?wasm=skyglow_demoHi HN — author here. iesna.eu is a browser-based ecosystem for working with photometric data: parsing standard luminaire files (LDT/EULUMDAT, IES LM-63, Oxytech, ATLA-S001), running design calculations against EN 13201 / ANSI/IES RP-8 / CJJ 45 / IES-IDA MLO, and (the part I most want to show off here) rendering real urban scenes in Bevy with the photometric data driving actual streetlight behavior, including sky-glow contribution. The Skyglow Analysis demo loads a real LDT file into a Bevy scene (Khronos Bistro test asset). The luminaire's intensity distribution drives the streetlight rendering directly — no fudging — and the sky-glow grade updates live as you adjust the uplight percentage. Swap to a full-cutoff fixture and the sky goes from F (Severe) back to A (Excellent). You can see the difference on the buildings as well as in the sky. Stack: Rust core (eulumdat-rs and friends, ~20 crates handling photometric formats), Bevy for the 3D rendering, WASM for browser deployment. No bacMay 2, 2026 9:08 AM
news.ycombinator.com
Show HN: Hackamaps – A global hackathon map I build after hitting Lovable Limitshttps://news.ycombinator.com/item?id=47982071I am based in Berlin, Germany and it is superfun to travel in Europe. I always have a guilty pressure of not connecting with other hackers or builders if I visit a specific place. I also realise planning trip around different events from platforms like Luma and Devpost is a very tedious process, I wish I have a worldwide map to see where people are building. Since I can't find one, I created Hackamaps.I started out knowing very little on web development. It is mostly just HTML, CSS, JS. For the first interation I just use AI tool like Lovable and Windsurf. I manage to make a working prototy in a week and I my network in linkedin finds in useful. However, there is a lot of bugs and I cant fixed them. My friend Cyrus told me to code one from scratch and I took the challenge and fight my way through. Don't get me wrong Lovable is great for UI but lacks in the minor details. After a while I also realise there is a vendor lock feeling where lovable tries to trap you in their specific cloud May 2, 2026 12:28 AM
github.com
Show HN: Porting partially deobfuscated Old School Runescape to use LWJGL 3https://github.com/stevefan1999-personal/void-client/tree/feat/native-to-java-portI tried to make this because I need the port to CheerpJ with a custom WebSocket wrapper that the private server is also modified to accept. The desktop client works flawlessly even on my Mac Mini M4 because LWJGL 3 ships an JNI implementation for mac-arm64. I have all the Windows, Linux and Mac platform to have their JNI bindings shipped together in the shadow jar, so as long as you have a private server running void (https://github.com/GregHib/void) then you are good to go.What I (or LLM) vibed out is that I told it to observe how the APIs are called, and used Ghidra MCP server that I configured to load and decompile the C native libraries and do a deep research, analyzing how the native libraries worked, and then rewrite the code without using JNI but to for example, use LWJGL's OpenGL binding for the Jagex's implementation for OpenGL, and also some other native libraries like the "C library" which is basically some hardware information. Then Ghidra will puke out the decompiled pseudMay 1, 2026 11:07 AM
bing.com
Kentucky Derby 2026 expert picks: Best bets, longshots, odds, winning strategies and morehttp://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6a88df95eac945c89a2cf7fa4deb80db&url=https%3A%2F%2Fwww.sportingnews.com%2Fus%2Fbetting%2Fnews%2Fkentucky-derby-expert-picks-2026-best-bets-longshots-odds%2F385a6b630e1fbfa28497c297&c=14697075176602721415&mkt=en-usWithin the annual sports calendar, the Kentucky Derby stands out as a distinctly special two minutes. Alongside the NFL’s Super Bowl and MLB’s World Series, it is one of those moments when global ...May 1, 2026 6:37 AM
nasa.gov
NASA Invites Media to Ireland Artemis Accords Signinghttps://www.nasa.gov/news-release/nasa-invites-media-to-ireland-artemis-accords-signing/Ireland will sign the Artemis Accords during a ceremony at 3 p.m. EDT Monday, May 4, at NASA Headquarters in Washington. NASA Administrator Jared Isaacman will host Ambassador of Ireland to the United States of America Geraldine Byrne Nason; Minister for Enterprise, Tourism and Employment Peter Burke, T.D., of Ireland; and U.S. Department of State […]Apr 30, 2026 8:45 PM
bing.com
Tetra Tech forecasts FY 2026 adjusted EPS of $1.50-$1.58 as backlog reaches $4.28Bhttp://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6a88f651e13944c9ac09d3c65aaa75c0&url=https%3A%2F%2Fseekingalpha.com%2Fnews%2F4583515-tetra-tech-forecasts-fy-2026-adjusted-eps-of-1_50-1_58-as-backlog-reaches-4_28b&c=3353529165508971166&mkt=en-us“I’m pleased to join you today for my first quarterly call as CEO of Tetra Tech,” Roger Argus said, adding, “Demand for clean water, environmental quality and resilient infrastructure continues to ...Apr 30, 2026 5:43 PM
bing.com
Tetra Tech forecasts FY 2026 adjusted EPS of $1.50-$1.58 as backlog reaches $4.28Bhttp://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6a8955ac29394b9e8644d3769de2eded&url=https%3A%2F%2Fseekingalpha.com%2Fnews%2F4583515-tetra-tech-forecasts-fy-2026-adjusted-eps-of-1_50-1_58-as-backlog-reaches-4_28b&c=3353529165508971166&mkt=en-us“I’m pleased to join you today for my first quarterly call as CEO of Tetra Tech,” Roger Argus said, adding, “Demand for clean water, environmental quality and resilient infrastructure continues to ...Apr 30, 2026 5:43 PM
bing.com
Mussoorie chills at 15°C after rain and hail lash Uttarakhandhttp://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6a8961f254c04930b49593cb268fa3d9&url=https%3A%2F%2Fwww.msn.com%2Fen-in%2Fnews%2Fother%2Fmussoorie-chills-at-15-c-after-rain-and-hail-lash-uttarakhand%2Fgm-GM07698E0E&c=16224164491335163937&mkt=en-usA sudden western disturbance has brought rain, hail, and strong winds to Uttarakhand, dropping Mussoorie’s temperature to around 15°C after recent heat. The India Meteorological Department has issued ...Apr 30, 2026 5:00 PM
bing.com
The Best Cat Litter Boxes We Tested for Every Kind of Feline (and Owner!)http://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6a892c1a38aa47e3827db9a28cde83bd&url=https%3A%2F%2Fpeople.com%2Fcat-litter-boxes-11786242&c=10870478861159535630&mkt=en-usWe independently evaluate all of our recommendations. If you click on links we provide, we may receive compensation. From small to big, hooded to uncovered, and standard to automatic Kayla Blanton is ...Apr 30, 2026 4:34 PM
bing.com
5 Themes That Defined Possible 2026http://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6a8d16e1c3754776b316f4f753eb2489&url=https%3A%2F%2Fwww.adweek.com%2Fmedia%2F5-themes-that-defined-possible-2026%2F&c=11769530038982034589&mkt=en-usPossible is no longer trying to prove itself. That’s what organizer and Beyond Ordinary Events CEO Christian Muche told me ahead of the event. The sentiment rang true on the ground this week in Miami ...Apr 30, 2026 1:21 PM
getbrifly.com
Show HN: Brifly – stop re-explaining your codebase to Claude Code every weekhttps://www.getbrifly.com/Hey HN -- I built Brifly because I was tired of reexplaining the same architecture to Claude Code/AI Agents every time.You can have a memory layer where you store everything about your company or project. When an AI agent is used by an engineer, you can simply ask it to use the CLI, and it will go and retrieve the relevant information.There is also management of who last edited a file, so you can understand who is responsible for the latest context level changes stored in Brifly.You can create different spaces, invite people to them, create threads for discussions, and add video and audio messages. By the way, transcriptions from video messages are also taken into account by the AI chat when you ask questions.I believe this is a great tool for teams, or even for solo users, especially when you have a lot of information and need to keep it updated all the time.There are also other cool features that can be useful. It is completely free, and if you need AI features, just add your OpenAI Apr 30, 2026 9:20 AM
bing.com
Microbot Medical® Announces the Addition of Senior Commercial Executive with Proven Track Record to Accelerate Commercial Readiness in Europe, the Middle East, and Asia (EMEA)http://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6a8cbc3f4e144229b81454f83b51465c&url=https%3A%2F%2Ffinance.yahoo.com%2Fsectors%2Fhealthcare%2Farticles%2Fmicrobot-medical-announces-addition-senior-123000969.html&c=15921567554101003586&mkt=en-usThe above button links to Coinbase. Yahoo Finance is not a broker-dealer or investment adviser and does not offer securities or cryptocurrencies for sale or facilitate trading. Coinbase pays us for ...Apr 30, 2026 5:30 AM
bing.com
Microbot Medical® Announces the Addition of Senior Commercial Executive with Proven Track Record to Accelerate Commercial Readiness in Europe, the Middle East, and Asia (EMEA)http://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6a8cd3eeb9fb465c8b09afc689f86257&url=https%3A%2F%2Ffinance.yahoo.com%2Fsectors%2Fhealthcare%2Farticles%2Fmicrobot-medical-announces-addition-senior-123000969.html&c=15921567554101003586&mkt=en-usThe above button links to Coinbase. Yahoo Finance is not a broker-dealer or investment adviser and does not offer securities or cryptocurrencies for sale or facilitate trading. Coinbase pays us for ...Apr 30, 2026 5:30 AM
github.com
Show HN: MAItion – Open-source RAG with pluggable connectors and chat UIhttps://github.com/WikiTeq/mAItionHey HN,We wanted to share a new tool we’ve been working on.Even when documentation is well-structured, sometimes it’s hard to find what you need. Information ends up spread across wikis, cloud drives, chat tools, ticketing systems, etc., and search can break down as info grows.mAItion is our attempt to solve that. It’s a way to unify search and retrieval across the systems that teams already use. It's an open-source alternative to tools like Glean and GetGuru, but it’s designed to be flexible, lightweight, self-hostable, and easier to adapt.What it does:- Ingests data from all the connected sources and builds vector and BM25 index- Converts the data into markdown (using MarkItDown, configurable)- Lets you run Hybrid search across the data stored via API or MCP- Lets you chat with the data using Open Web UI as a frontend (bundled) or connect other arbitrary chat UI- Keeps the data fresh using scalable Celery workers (per source schedules)- Deduplicates documents over sources during ingeApr 29, 2026 10:26 PM
nasa.gov
I Am Artemis: Ryan Schultehttps://www.nasa.gov/missions/artemis/i-am-artemis/i-am-artemis-ryan-schulte/Listen to this audio excerpt from Ryan Schulte, Orion flywheel project manager: As the four Artemis II astronauts traveled on a 694,481-mile journey around the Moon and back, the Orion spacecraft provided them with all the essentials for deep space life, including daily exercise. The crew used an exercise device called the flywheel throughout their mission to maintain their physical and mental health, and Ryan Schulte, Orion […]Apr 29, 2026 9:45 PM
bing.com
Wayzata stars Christian Wiggins, Nolen Anderson ready for next step in college basketballhttp://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=6a8cc9c467924cb4aedd2a06a2c3bd1f&url=https%3A%2F%2Fwww.aol.com%2Fnews%2Fwayzata-stars-christian-wiggins-nolan-035113128.html&c=9405948169873467090&mkt=en-usMINNEAPOLIS (FOX 9) - At Wayzata High School, Christian Wiggins and Nolen Anderson built one of the most dynamic duos in Minnesota, leading the Trojans to back-to-back state tournament appearances and ...Apr 29, 2026 8:51 PM
