https://wiki.quizz.vn/ 2026-04-15T18:19:24+00:00 https://wiki.quizz.vn/ https://wiki.quizz.vn/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2025-12-28T07:07:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=aws:compute:ec2:ami&rev=1766905669&do=diff AMI (Amazon Machine Image) What it is: A template that contains the OS and initial software configuration for an EC2 instance. What it’s for: * Launch instances with the same base OS setup. * Create “golden images” for consistent deployments. text/html 2025-12-28T07:08:37+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=aws:compute:ec2:instance-profile&rev=1766905717&do=diff Instance Profile What it is: A container used to attach an IAM role to an EC2 instance. What it’s for: * Let EC2 securely call AWS services without storing access keys on the instance. Key ideas: * EC2 receives temporary credentials via metadata (IMDS). text/html 2025-12-28T07:07:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=aws:compute:ec2:instance-type&rev=1766905648&do=diff Instance Type What it is: The hardware profile of an EC2 instance (vCPU, memory, network, sometimes GPU). What it’s for: * Match workload needs (compute-heavy, memory-heavy, bursty, etc.). * Control cost (bigger instance = higher cost). Common categories (high level): text/html 2025-12-28T07:08:04+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=aws:compute:ec2:key-pair&rev=1766905684&do=diff Key Pair What it is: A public/private key pair used to securely connect to EC2 (commonly via SSH). What it’s for: * Authenticate SSH access without passwords. * Secure initial access to instances. Key ideas: * You keep the private key; AWS stores the text/html 2025-12-28T07:08:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=aws:compute:ec2:user-data&rev=1766905700&do=diff User Data What it is: A script/commands you provide at launch that run automatically on first boot. What it’s for: * Install packages, pull code, configure services at startup. * Bootstrap instances in an automated way. Key ideas: * Runs once at instance initialization (by default).