Feed | Hashnode

New & popular

Omar Moustafa12h ago · 10 min read

One Row. Two Winners. The Concurrency Bug That Fooled My Tests

25 requests. One database row. Two successful claims. Wait, what? Ever built something, tested it, watched every test pass, and thought, yep, this is solid? Yeah. Same here. Until I discovered that my

2 omarcodes.io

Powerduck32m ago · 5 min read

An MCP Tool That Hangs: Modeling Long-Running Operations as Async Jobs

Quick answer: A blocking MCP tool that wraps a long-running operation is a design error that shows up as a hung agent: the model waits on a single call that can take minutes, the request times out, an

blogs.powerduck.com

Hritik ranjan33m ago · 43 min read

🚀 DevTrack: Building a Three-Tier DevOps Learning Tracker with Docker, Flask, MySQL & Nginx

📌 What We Are Building In this project, we will build DevTrack – DevOps Learning Tracker, a simple web application designed to track DevOps learning topics. The application allows users to: Add lear

blogs.hritikranjan.in

Doogal Simpson55m ago · 4 min read

TypeScript private vs Native JS Private Fields (#)

TypeScript's private keyword only enforces access restrictions during compilation, leaving properties visible at runtime and during serialization like JSON.stringify(). To achieve true runtime privacy

doogal.dev

404 Founders58m ago · 3 min read

Cisco Catalyst SD-WAN CVE-2026-20127 KeyDrift Malware

UAT-11473, an advanced persistent threat actor, deployed the KeyDrift malware framework against Cisco Catalyst SD-WAN controllers, exploiting CVE-2026-20127 to bypass authentication. KeyDrift is desig

404-founders.com

Mo' Claudius1h ago · 10 min read

Stop Using effect() for Everything

A cart component lands in review. The quantity and the price are signals, which is fine. Then there is a third signal called total, and an effect whose whole job is to keep it in sync: // The trap: lo

kodedmo.dev

Atish Maske1h ago · 4 min read

Migrating from n8n & Render to Zero-Cost Serverless

Every morning at 09:00 AM, my Telegram bot sends an AI-prioritized checklist of active Notion tasks plus 1 curated article from my reading backlog. During the day, I text the bot to create tasks, arch

clearyourdoubt.in

Yadukrishnan18h ago · 7 min read

Fast Approximate Analytics in Scala with Apache DataSketches

Apache DataSketches is an open-source library of probabilistic algorithms designed for fast, streaming data analysis with sub-linear memory usage. While this post uses Scala (running on the JVM), Data

yadukrishnan.live

ZyVOP2h ago · 13 min read

How to Allow SSH Login From Only Your IP on a VPS (Without Locking Yourself Out)

Spin up a fresh VPS, wait a few minutes, then look at your SSH logs. sudo grep "Failed password" /var/log/auth.log | tail On RHEL-based systems (Rocky, Alma, CentOS) the file is /var/log/secure inste

blog.zyvop.com

Brandon Sooknanan2h ago · 5 min read

8 free security tools for IT teams: CVE, DMARC, SPF, DKIM and MX checks (no sign-up)

Drafted with AI assistance. Every tool and link below was checked on the live site before publishing. Most security checks don't need a paid product or a sales call. They need public data, read correc

blog.varaxontech.com

New & popular

One Row. Two Winners. The Concurrency Bug That Fooled My Tests

An MCP Tool That Hangs: Modeling Long-Running Operations as Async Jobs

🚀 DevTrack: Building a Three-Tier DevOps Learning Tracker with Docker, Flask, MySQL & Nginx

TypeScript private vs Native JS Private Fields (#)

Cisco Catalyst SD-WAN CVE-2026-20127 KeyDrift Malware

Stop Using effect() for Everything

Migrating from n8n & Render to Zero-Cost Serverless

Fast Approximate Analytics in Scala with Apache DataSketches

How to Allow SSH Login From Only Your IP on a VPS (Without Locking Yourself Out)

8 free security tools for IT teams: CVE, DMARC, SPF, DKIM and MX checks (no sign-up)

Trending tags this week

The foreword

Authors worth a look

Trending tags this week

Trending tags this week

Authors worth a look

Authors worth a look

Search Hashnode

New & popular

One Row. Two Winners. The Concurrency Bug That Fooled My Tests

An MCP Tool That Hangs: Modeling Long-Running Operations as Async Jobs

🚀 DevTrack: Building a Three-Tier DevOps Learning Tracker with Docker, Flask, MySQL & Nginx

TypeScript private vs Native JS Private Fields (#)

Cisco Catalyst SD-WAN CVE-2026-20127 KeyDrift Malware

Stop Using effect() for Everything

Migrating from n8n & Render to Zero-Cost Serverless

Fast Approximate Analytics in Scala with Apache DataSketches

How to Allow SSH Login From Only Your IP on a VPS (Without Locking Yourself Out)

8 free security tools for IT teams: CVE, DMARC, SPF, DKIM and MX checks (no sign-up)

Trending tags this week

The foreword

Authors worth a look

Trending tags this week

Trending tags this week

Authors worth a look

Authors worth a look