How to find the MAC address of your Raspberry Pi

You sometimes need to find out the MAC address of your Raspberry Pi. For instance, you want to find it among the list of devices attached to your LAN, because you want your router’s DHCP service to assign your RPi a permanently dedicated IP address instead of letting the DHCP just assign it the next available IP address each time you start it up. Then you can SSH into the same IP address each time to log into your RPi from your PC or Mac knowing it will always be there, without having to search for the RPi on the network.
Some LANs are configured to allow access only for a white-listed devices by MAC address, so you’ll also need to know yours to be able to use such a LAN.

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A Node.JS Application on Amazon Cloud. Part 3: A simple Webserver in Javascript using Node, Express, and MongoDB

In this third part of our exercise, we’re going to use the primary AWS EC2 instance on which we installed Node in Part 1, and the database EC2 Instance  we set up in Part 2, as the platform for  building a simple web application server. We are going to code that web server in Javascript, using Node together with the Express and Mongoose Node library packages.

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A Node.JS Application on the Amazon Cloud. Part 1: Installing Node on an EC2 instance

In this three-part exercise, we’re going to build a web application using Javascript on both the client and server side, using Amazon Web Services (AWS) cloud-hosting infrastructure and the Node.JS framework.

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What we’re going to do first is install Node on an Elastic Cloud Computing (EC2) virtual server instance provided by Amazon Web Services. In the following parts of this series, we’ll add a MongoDB database instance, and develop a simple server-side web application in Javascript using the Express framework and the Mongoose library for accessing our database.

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