How to use multiple AWS Accounts from the command line?

Question

I\'ve got two different apps that I am hosting (well the second one is about to go up) on Amazon EC2.

How can I work with both accounts at the command line (Mac OS X

Answer 1

To use an IAM role, you have to make an API call to STS:AssumeRole, which will return a temporary access key ID, secret key, and security token that can then be used to sign future API calls. Formerly, to achieve secure cross-account, role-based access from the AWS Command Line Interface (CLI), an explicit call to STS:AssumeRole was required, and your long-term credentials were used. The resulting temporary credentials were captured and stored in your profile, and that profile was used for subsequent AWS API calls. This process had to be repeated when the temporary credentials expired (after 1 hour, by default).

https://aws.amazon.com/blogs/security/how-to-use-a-single-iam-user-to-easily-access-all-your-accounts-by-using-the-aws-cli/