We now have all the information required to launch our instance; let's finally launch it as follows:

$ aws ec2 run-instances 
      --instance-type t2.micro 
      --key-name EffectiveDevOpsAWS 
      --security-group-ids sg-11d4fe68 
      --image-id ami-a4c7edb2
{
    "OwnerId": "511912822958",
    "ReservationId": "r-6d7c15c1",
    "Groups": [],
    "Instances": [
        {
            "Monitoring": {
                "State": "disabled"
            },
            "PublicDnsName": "",
            "RootDeviceType": "ebs",
            "State": {
                "Code": 0,
                "Name": "pending"
            },
            "EbsOptimized": false,
            "LaunchTime": "2017-07-31T08:39:12.000Z",
            "PrivateIpAddress": "172.31.27.66",
            "ProductCodes": [],
            "VpcId": "vpc-f7dc4093",
            "StateTransitionReason": "",
            "InstanceId": "i-97000624",
            "ImageId": "ami-a4c7edb2",
            "PrivateDnsName": "ip-172-31-27-66.ec2.internal",
            "KeyName": "EffectiveDevOpsAWS",
            "SecurityGroups": [
                {
                    "GroupName": "HelloWorld",
                    "GroupId": "sg-11d4fe68"
                }
            ],
            "ClientToken": "",
            "SubnetId": "subnet-4f3bdb17",
            "InstanceType": "t2.micro",
            "NetworkInterfaces": [
                {
                    "Status": "in-use",
                    "MacAddress": "0e:fd:f8:18:bb:0f",
                    "SourceDestCheck": true,
                    "VpcId": "vpc-f7dc4093",
                    "Description": "",
                    "NetworkInterfaceId": "eni-1d23a243",
                    "PrivateIpAddresses": [
                        {
                            "PrivateDnsName": "ip-172-31- 
                            2766.ec2.internal",
                            "Primary": true,
                            "PrivateIpAddress": "172.31.27.66"
                        }
                    ],
                    "PrivateDnsName": "ip-172-31-27-66.ec2.internal",
                    "Attachment": {
                        "Status": "attaching",
                        "DeviceIndex": 0,
                        "DeleteOnTermination": true,
                        "AttachmentId": "eni-attach-6398c28f",
                        "AttachTime": "2017-07-31T08:39:12.000Z"
                    },
                    "Groups": [
                        {
                            "GroupName": "HelloWorld",
                            "GroupId": "sg-11d4fe68"
                        }
                    ],
                    "SubnetId": "subnet-4f3bdb17",
                    "OwnerId": "511912822958",
                    "PrivateIpAddress": "172.31.27.66"
                }
            ],
            "SourceDestCheck": true,
            "Placement": {
                "Tenancy": "default",
                "GroupName": "",
                "AvailabilityZone": "us-east-1a"
            },
            "Hypervisor": "xen",
            "BlockDeviceMappings": [],
            "Architecture": "x86_64",
            "StateReason": {
                "Message": "pending",
                "Code": "pending"
            },
            "RootDeviceName": "/dev/xvda",
            "VirtualizationType": "hvm",
            "AmiLaunchIndex": 0
        }
    ]
}

You can track the progress of the instance creation. To do that, get the instance ID provided in the output of the aws ec2 run-instances command and run the following command:

$ aws ec2 describe-instance-status --instance-ids i-97000624
{
    "InstanceStatuses": [
        {
            "InstanceId": "i-97000624",
            "InstanceState": {
                "Code": 16,
                "Name": "running"
            },
            "AvailabilityZone": "us-east-1a",
            "SystemStatus": {
                "Status": "initializing",
                "Details": [
                    {
                        "Status": "initializing",
                        "Name": "reachability"
                    }
                ]
            },
            "InstanceStatus": {
                "Status": "initializing",
                "Details": [
                    {
                        "Status": "initializing",
                        "Name": "reachability"
                    }
                ]
            }
        }
    ]
}

The instance will be ready once the Status under SystemStatus changes from initializing to ok.