Why doesn't my AWS CLI work?

There are several potential reasons why your AWS CLI is not working as expected, despite having set up the credentials and permissions. Let's explore some possible causes and solutions:

1. Credential Expiration: Even though you've recently created and configured your access keys, it's worth double-checking that they haven't expired or been inadvertently revoked. You can verify this in the AWS Management Console under the IAM user settings.

2. Incorrect Configuration: Ensure that the credentials you entered during the aws configure process are exactly correct, including the access key ID and secret access key. Even a small typo can cause authentication failures.

3. Environment Variables: Check if there are any AWS-related environment variables set on your system that might be overriding your configured credentials. Look for variables like AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, or AWS_SESSION_TOKEN. If present with incorrect or outdated values, they could cause conflicts.

4. Profile Issues: If you're using named profiles, make sure you're either specifying the correct profile with the --profile option or that you're using the intended default profile.

5. Time Synchronization: Ensure that your system clock is accurately synchronized. AWS authentication is time-sensitive, and significant clock skew can cause token validation failures.

6. Firewall or Network Issues: If you're behind a corporate firewall or using a VPN, it might be interfering with the AWS CLI's ability to communicate with AWS services.

7. CLI Version: Although you're using a recent version of the AWS CLI, ensure you're on the latest version as some issues may have been resolved in updates.

To troubleshoot further:

1. Try running your AWS CLI commands with the --debug flag to get more detailed error information.

2. Attempt to use the AWS CLI from a different network or device to rule out local network issues.

3. If possible, try creating a new IAM user with similar permissions and new access keys to see if the issue persists.

4. Verify that you're targeting the correct AWS region in your configuration and commands.

If none of these steps resolve the issue, you may need to contact AWS Support for further assistance, as there could be an account-specific problem that requires their intervention.
Sources
aws cli getting: An error occurred (InvalidClientTokenId) when calling for any call | AWS re:Post
aws cli commands hang with no response | AWS re:Post
AWS was not able to validate the provided access credentials | AWS re:Post

This usually means the CLI is using outdated or incorrect credentials, even if you just created them. A few things to double-check:

Make sure your access key and secret key belong to the IAM user you configured — not accidentally linked to a different account or expired.

Run:

bash Copy Edit aws configure list ...to verify what credentials and region are actually being used. 3. If you're rotating keys, be sure to remove or comment out old ones in your ~/.aws/credentials file — the CLI may still be picking up stale tokens.

Bonus tip: If you're using AWS SSO or a federated login, CLI access won't work unless explicitly set up with aws configure sso.