I need to get public IPv4 address on current EC2 or Lightsail VM Linux/Unix instance. How do I find Public IP address AWS EC2 or Lightsail VM?

One can easily find out their public IPv4 IP address on a Linux or Unix-like operating systems running on AWS EC2 or Lightsail VM. This page explains how to find out your IP address using command-line options for AWS EC2 instance.

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Find Public IP address AWS EC2 or Lightsail VM

1. Open the terminal application and login using ssh: ssh ec2-user@my-aws-instanace-name
2. To get public IPv4 address assigned by the AWS for EC2/Lightsail vm, run:
   dig +short myip.opendns.com @resolver1.opendns.com
   Or
   dig TXT +short o-o.myaddr.l.google.com @ns1.google.com
3. You should see your IP address on the screen. It is the fastest way to find out your public IP address without using 3rd party site.
4. Another option, run curl http://checkip.amazonaws.com

Let us see all commands and options in details.

Use dig command to find EC2 or Lightsail VM IP address

Type dig command:
dig +short myip.opendns.com @resolver1.opendns.com
## or ##
dig TXT +short o-o.myaddr.l.google.com @ns1.google.com
My IP address of AWS EC2 vm is as follows:

3.227.102.13

Get public IP address of current EC2 instance

One can use the following curl command to get private IPv4:
curl http://169.254.169.254/latest/meta-data/local-ipv4
And, to get public IPv4, run:
curl http://169.254.169.254/latest/meta-data/public-ipv4
curl http://checkip.amazonaws.com
Of course, you can use third party web sites too:
curl icanhazip.com
curl ifconfig.me
My aws Lightsail IP address:

3.227.102.13

How to use awk cli to obtain information

First, make sure your asw cli configured, run:
aws configure
You need to input your AWS API access token and key. See this page about aws cli. For Lightsail VM, try the following command to obtain information about all static IPs in your account:
aws lightsail get-static-ips
We can get information about a specific static IP. For example, find info about a static IP named “my-www-static-ip1”
aws lightsail get-static-ip --static-ip-name my-www-static-ip1

For EC2 instance try the following (feel free to replace {YOUR_ID_HERE} with actual EC2 instance ID):
aws ec2 describe-instances --instance-ids {YOUR_ID_HERE} --query 'Reservations[*].Instances[*].PublicIpAddress' --output text

Conclusion

You learned how to obtain the static IP addresses of AWS EC2 or Lightsail instance running either Linux or Unix/FreeBSD operating system.