AWS Certified Developer Associate (#41)

After installing the AWS CLI, a Developer tries to run the command

aws

configure

but receives the following error:

Error: aws: command not found

What is the most likely cause of this error?

The
aws
executable is not in the
PATH
environment variable.
Access to the
aws
executable has been denied to the installer.
Incorrect AWS credentials were provided.
The
aws
script does not have an executable file mode.