How do you get the private IP address of the eth1 network interface on an Amazon EC2 instance?

Question

I've attached multiple elastic network interfaces to an Amazon EC2 instance, and I need get the private IP address of the eth1 network interface. What command(s) do I need to run to get it?

Accepted Answer

To get the private IP address of an Amazon EC2 instance, you can use either of the following [describe-instances](https://docs.aws.amazon.com/cli/latest/reference/ec2/describe-instances.html) AWS CLI commands:

**Important:** Replace **** with your Amazon EC2 instance's ID. Replace **** with the private DNS name of the network interface.
```bash
aws ec2 describe-instances --instance-id  --query 'Reservations[0].Instances[0].NetworkInterfaces[?Attachment.DeviceIndex==`1`].PrivateIpAddress'
```
**-or-**

```bash
aws ec2 describe-instances --filters Name=private-dns-name,Values= --query 'Reservations[0].Instances[0].NetworkInterfaces[?Attachment.DeviceIndex==`1`].PrivateIpAddress'
```

How do you get the private IP address of the eth1 network interface on an Amazon EC2 instance?

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