diff --git a/README.md b/README.md
index 7823fb3..fe9330a 100644
--- a/README.md
+++ b/README.md
@@ -1502,6 +1502,12 @@ A small group of programmers wants to change how we code—before catastrophe st
 * [milo-minderbinder/AWS-PlantUML](https://github.com/milo-minderbinder/AWS-PlantUML) - PlantUML sprites, macros, and other includes for AWS components.
 * [Amazon S3 Tools](https://s3tools.org/usage) - S3cmd usage (as shown if you type `s3cmd -h`). To access all the options and commands listed below, you'll need s3cmd version 2.0 or newer
 
+> Tips
+* [AWS Docs](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-instance-addressing.html) - determine your instance's IPv4 addresses using instance metadata : 
+  1. Connect to your instance.
+  2. Use the following command to get its private IP address: `curl http://169.254.169.254/latest/meta-data/local-ipv4`
+  3. Use the following command to get its public IP address:  `curl http://169.254.169.254/latest/meta-data/public-ipv4`
+
 ## Bitbucket
 * [Atlassian Docs](https://developer.atlassian.com/stash/docs/latest/how-tos/updating-build-status-for-commits.html) - Updating build status for commits
 * [Atlassian Docs](https://confluence.atlassian.com/bitbucketserver/setting-up-ssh-port-forwarding-776640364.html) - Setting up SSH port forwarding (for BitBucket or other git server)
@@ -3084,6 +3090,12 @@ type `curl ident.me` to know your public ip
   * Trace all connections on specific port to `/var/log/messages` (syslog) using iptables : `sudo iptables -I INPUT -p tcp --match multiport --dports 443,636,389,8095,80 --syn -j LOG --log-prefix "HTTPS SYN: "`
   * Removing iptables rule : `sudo iptables -D INPUT -p <etc rest of your above rule>`
 
+> Tips
+* [AWS Docs](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-instance-addressing.html) - determine your instance's IPv4 addresses using instance metadata : 
+  1. Connect to your instance.
+  2. Use the following command to get its private IP address: `curl http://169.254.169.254/latest/meta-data/local-ipv4`
+  3. Use the following command to get its public IP address:  `curl http://169.254.169.254/latest/meta-data/public-ipv4`
+
 # News :exclamation:
 * :fire: [**HCKR News**](https://hckrnews.com/) - unofficial alternative hacker news interface, fixing some Hacker News UI [Issues](https://hckrnews.com/about.html)
 * :fire: [**Lobsters**](https://lobste.rs/) - Lobsters is a technology-focused community centered around link aggregation and discussion