MongoDB In-Depth: Installing MongoDB on Linux

In this post we are going to install MongoDB on a Linux operating system.

Here are the steps:

1.  Download the community edition of MongoDB from the page https://www.mongodb.com/download-center?jmp=nav#community click on the "Linux" tab is selected and select the Linux version that you want

































2. After you download the file extract the file with the tar command

tar -zxvf mongodb-linux-x86_64-rhel70-4.0.1.tgz

JavaScript Functions: Using Function As A Namespace

JavaScript does not have a built-in feature to define a namespace.  A namespace is basically a container of your code that it does not pollute the other codes that's on page.  Namespace allows you to play nice with people's code and other JavaScript libraries.

Fortunately, JavaScript functions have their own contexts and scope.  Therefore, we can use functions as a namespace so that it does not pollute the global scope.

The easiest way to create a namespace on a page is to encapsulate everything in an anonymous function like the code below.

    <script>
        (function () {
            // put your code here
        }());

    </script>

Another way of using namespace is to assign the anonymous function to a variable

    <script>
       var myNameSpace = (function () {
            // put your code here
        }());

    </script>

Fedora: Install Oracle JDK

Linux installation comes with OpenJDK, but you want to use the official JDK from Oracle instead to run most of the software.  This post will show you the steps to install the Oracle JDK

First let's check to see what version of JDK we have installed by running the command

java -version










As you can see Fedora installs the OpenJDK library by default.  What we want to do is replace it with the Oracle version instead.

Type the address http://www.oracle.com/technetwork/java/javase/downloads/index.html
into Firefox in the Fedora VM and click on the "JDK" download button

Reset Your Virtual Machines Password In Azure

One of the most useful feature in Azure is the ability to reset your virtual machine's password.  There will be times when you create a virtual machine that you put aside for a long time and you forgot the password for the machine.

To reset your password do the following:

1.  Log into Azure by typing the URL https://portal.azure.com
2. Click on the "Virtual Machines" link






3. Select the virtual machine you want to reset your password on










4. Click "Start" to start the machine, your machine must be running before you can reset your password











5. Under "SUPPORT + TROUBLESHOOTING" select "Reset Password"












6.  Select the "Reset Password" radio button, enter the username and password you want to reset to.  Then click "Update" when you are finish




















Surprisingly the reset password function takes a long time to apply. So you have to wait for a while before you can use your virtual machine again.

ASP.NET MVC: Add Area For Administrators

An ASP.NET MVC can get big, and it could be overwhelming.  Areas are a way to break up the application into smaller segments,  A perfect candidate for an Area is the Administrative features of the site because it has multiple pages, and functionalities.  So it is a good idea to segment off the Administration area to its own area (no pun intended).

To add an Area to your MVC application right-click on the project and click "Add", then select "Area..."


















Type in the word "Admin" in the "Add Area" dialog

Linux CentOS In-Depth: Connect CentOS Deployed In Azure With Putty

In the previous blog we deployed a full stack CentOS Server in Azure.  In this blog we are going to connect the server using a tool call Putty.  You can download Putty at https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html .

Follow the steps below to connect to your Ubuntu Server in Azure:

1.  Log into the Azure Portal at https://portal.azure.com
2.  Click on "Virtual Machines"