What it is: An SSM feature to run commands/scripts on one or many instances without logging in.

What it’s for:

• Execute administrative tasks at scale (restart service, install package, collect logs).
• Reduce manual operations.

Key ideas:

• Supports targeting by instance IDs or tags.
• Actions are auditable.

Exam cues:

• “run a script on hundreds of instances” → Run Command.

Hard words:

• *at scale* /æt skeɪl/: ở quy mô lớn
• *administrative* /ədˈmɪnɪstrətɪv/: quản trị
• *auditable* /ˈɔːdɪtəbl/: có thể kiểm toán