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17 guides
Coldwast wrote
Jun 22, 2026 in Programming, DevOps, Automation — CI/CD automates the path from a code change to a tested, deployed app. What continuous integration and delivery/deployment mean, how a pipeline works, the common tools, and why teams rely on it.
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Jun 22, 2026 in Programming, Servers, Security — SSH (Secure Shell) is the encrypted protocol you use to log in to and run commands on a remote server safely. How the handshake and keys work, passwords vs SSH keys, the everyday commands, and where you meet it.
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Jun 19, 2026 in Programming, Hosting, Infrastructure — A VPS is your own isolated slice of a physical server, with dedicated resources and full root access. How virtualization works, VPS vs shared/dedicated/cloud, managed vs unmanaged, and what you use one for.
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Jun 19, 2026 in Programming, DevOps, orchestration — Kubernetes is an open-source system that runs and coordinates containers across many machines — scheduling, scaling, healing and networking them. The core concepts (pod, node, cluster, deployment, service), how it relates to Docker, and when you actually need it.
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Jun 19, 2026 in Programming, DevOps, containers — Docker packages an application and everything it needs into a container that runs the same way on any machine. Containers vs virtual machines, the key concepts (image, container, Dockerfile, registry), and Docker vs Kubernetes.
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Jun 18, 2026 in Programming, Tools, Beginners — An IDE bundles a code editor, build tools, a debugger and version control into one app — so you write, run and fix code in one place. What it includes, IDE vs editor, and how to choose one.
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Jun 18, 2026 in Programming, Data, Databases — SQL databases store structured data in related tables with a fixed schema and strong consistency; NoSQL trades some of that for flexible schemas and horizontal scale. Consistency, scaling, querying, and when to choose each.
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Jun 18, 2026 in Programming, Web, APIs — REST uses HTTP + JSON (human-readable, universal); gRPC uses HTTP/2 + Protocol Buffers (fast, typed, streaming) for service-to-service calls. Performance, streaming, browser support, and when to pick each.
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Jun 17, 2026 in Programming, Web, APIs — REST and GraphQL are two ways to build a web API: REST uses many endpoints with fixed responses; GraphQL uses one endpoint where the client asks for exactly the fields it needs. Over/under-fetching, caching, and when to choose each.
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Jun 17, 2026 in Programming, Web, Concepts — A webhook is an automated HTTP request a service sends you when an event happens — the reverse of an API call you make. How webhooks differ from polling an API, how to receive one safely, and real examples (Stripe, GitHub, Slack).
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Jun 15, 2026 in Programming, Concepts — A variable is a named container that holds a value your program can read and change. How you declare and assign one, types and scope, constants vs variables, and why they are the building blocks of every program.
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Jun 15, 2026 in Programming, Data, Databases — A database is an organised collection of data, managed by software that lets you store, query and update it reliably. Relational vs NoSQL, key concepts (tables, schema, ACID), real examples, and how it relates to SQL.
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Jun 14, 2026 in Programming, Data, Databases — SQL is the standard language for storing, querying and changing data in relational databases. Core commands (SELECT, INSERT, UPDATE, DELETE), how a query works, SQL vs NoSQL, and why it is still essential in 2026.
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Jun 14, 2026 in Programming, Tools, Workflow — Git is a distributed version-control system that tracks every change to your code so you can branch, merge, collaborate and undo. Core concepts (commit, branch, merge, remote), the daily workflow, and how it differs from GitHub.
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Jun 14, 2026 in Programming, Concepts — An algorithm is a finite, step-by-step procedure that turns input into output. Its key properties, everyday and code examples, why efficiency (Big-O) matters, and how it differs from a program.
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Jun 14, 2026 in Programming, Web, Data — JSON is a lightweight, human-readable text format for structured data — the language most web APIs and config files speak. Its syntax, why it is everywhere, how it compares to XML, and its honest limits.
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Jun 14, 2026 in Programming, Web, Concepts — An API is a contract that lets one piece of software talk to another. The main kinds (web/REST, library, OS), how a web request and response work, and why APIs are everywhere in modern software.
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