Login into an EC2 instance and verify whether ec2-user can run Docker commands without using sudo by executing following command:
[ec2-user@ip-54-196-74-162 ~]$ docker info
This will display system-wide information regarding the Docker installation, as shown in the following output:
Containers: 1 Running: 1 Paused: 0 Stopped: 0 Images: 1 ... Kernel Version: 4.9.62-21.56.amzn1.x86_64 Operating System: Amazon Linux AMI 2017.09 ... Live Restore Enabled: false
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