Linux
441 entries match these filters
- 0301 What is HTTP? HTTP is the request and response language that browsers, apps and servers use to exchange web pages and data. Beginner · Explains an idea · Any system Article Making requests 15 Oct 2026
- 0317 Fix: Permission denied when running a script (chmod +x) bash: ./script.sh: Permission denied means the file exists but you may not execute it. Usually the execute bit is missing; sometimes the… Beginner · Fixes an error · Linux, macOS Article Basics · Users, sudo & hardening 15 Oct 2026
- 0302 What is a status code? A status code is the three digit number a web server returns to say whether a request worked, like 200 OK or… Beginner · Explains an idea · Any system Article Status codes 15 Oct 2026
- 0318 Fix: fatal: not a git repository Git looked in the current directory and every parent for a .git folder and found none. You are in the wrong directory,… Beginner · Fixes an error · Any system Article Common errors · Setup 15 Oct 2026
- 0303 What is CORS? CORS is a browser rule that decides whether a web page from one site is allowed to call an API on another… Beginner · Explains an idea · Any system Article Making requests 15 Oct 2026
- 0319 Fix: npm ERR! EACCES permission denied npm cannot write to a directory it needs: the global install location, its cache in ~/.npm, or a node_modules owned by root.… Beginner · Fixes an error · Linux, macOS Article Common errors · Node.js 15 Oct 2026
- 0304 What is a cookie? A cookie is a small piece of text a website stores in your browser so it can recognise you on the next… Beginner · Explains an idea · Any system Article Authentication 15 Oct 2026
- 0289 What is a process? A process is a running program; the operating system gives each one its own memory and an ID number. Beginner · Explains an idea · Any system Article Processes & ports 15 Oct 2026
- 0305 What is a token? A token is a string that proves who you are or what you may do, sent with requests instead of a password. Beginner · Explains an idea · Any system Article Authentication 15 Oct 2026
- 0290 What is a cron job? A cron job is a command scheduled to run automatically at set times, such as every night at two o'clock. Beginner · Explains an idea · Any system Article cron & timers 15 Oct 2026