To find public IP of AWS EC2 instance, if we run ifconfig it does not returns the external public IP. Running ifconfig gives the local loopback address and eth0 address. However the eth0 address is not accessible from outside.
One easy way is to look at AWS console which lists the public IP. However that's not an option when you want to find the public IP in a programmatic or scripting environment. For finding the public IP of EC2 instance in a shell environment, you can do the following way
One easy way is to look at AWS console which lists the public IP. However that's not an option when you want to find the public IP in a programmatic or scripting environment. For finding the public IP of EC2 instance in a shell environment, you can do the following way
curl ifconfig.me
This will return the public IP of ec2 instance.
The other way to do that is again using curl
curl http://169.254.169.254/latest/meta-data/public-ipv4
And for the local IP do the following
curl http://169.254.169.254/latest/meta-data/local-ipv4
Setting the public IP to a variable in shell script
Setting the public IP to a variable in shell script
publicIp=$(curl -s http://169.254.169.254/latest/meta-data/public-ipv4)
Echoing will give the public IP
echo $publicIP
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