What it is: A suite of tools to manage and operate fleets of servers (EC2 and on-prem).
What it’s for:
Remote access without opening SSH ports (Session Manager).
Run commands on many instances (Run Command).
Patch and maintain
OS (Patch Manager).
Store configuration parameters (Parameter Store — see security branch).
Key ideas:
Exam cues:
“access EC2 without SSH” → Session Manager.
“run same command on 100 instances” → Run Command.
“patch fleet automatically” → Patch Manager.
Hard words:
*fleet* /fliːt/: nhóm nhiều máy
*remote* /rɪˈmoʊt/: từ xa
*posture* /ˈpɑːstʃər/: trạng thái (mức độ an toàn)