General · Learning hub

SSH cheat sheet & developer notes

SSH cheat sheet and 2 curated developer notes — core concepts, patterns, and interview prep. Maintained by the DevRecall team.

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01 · SSH

Key-Based Auth & Configuration

Key-Based Auth & Configuration. Generating & Deploying Keys. ssh-keygen -t ed25519 -C "you@example.com" # modern, fast, secure default # adding a passphrase means a stolen key FILE alone isn't immediately usable ssh-copy…

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02 · SSH

File Transfer & Tunneling

File Transfer & Tunneling. SCP, SFTP & rsync. scp file.txt user@host:/remote/path/ # local -> remote scp user@host:/remote/file.txt . # remote -> local scp user@host1:/path/file user@host2:/path/ # remote -> remote, stre…

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TypeScriptgeneral

Interview Questions

TypeScript Interview Questions. Comprehensive TypeScript interview questions covering type system, generics, utility types, and best practices:. Fundamentals. 1. What is TypeScript?. TypeScript is a…

Mar 28, 2026

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TypeScriptgeneral

Advanced Types (Generics & Utility Types)

TypeScript Advanced Types. Generics. // Generic function function identity<T>(arg: T): T { return arg; } const num = identity<number>(42); // Explicit const str = identity('hello'); // Inferred //…

Mar 3, 2026

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