Most teams treat the AWS Command Line Interface as a tool for quick scripts and ad‑hoc automation. That’s fine, until you realize that those same commands can form the backbone of a consistent, auditable, and hardened workflow that spans AWS, Azure, and Google Cloud. Multi‑cloud security starts with the discipline of execution, and the CLI is where execution happens at scale.
The first step is identity. Map and align IAM policies in AWS with your equivalent roles in other clouds. The AWS CLI makes it simple to query, export, and version‑control these policies. Store them alongside your infrastructure code, and make them part of a unified deployment pipeline. Then, script automated checks to verify principle of least privilege across providers. This is not optional—misconfigurations aren’t contained by cloud boundaries.
Next, handle secrets and credentials with zero tolerance for manual handling. Use the AWS CLI to integrate with AWS Secrets Manager or Parameter Store, and bridge these to other vault systems across clouds. Any plaintext secret in a local file is a future incident report. Harden session tokens, enforce MFA for CLI access, and rotate keys on a schedule that doesn’t bend for convenience.