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Apache Hadoop Nutch Tutorial

In this tutorial, we will go through and introduce another component of the Apache Hadoop ecosystem that is Apache Nutch. Apache Nutch is a Web crawler which takes advantage of the distributed Hadoop ecosystem for crawling data.                   1. Introduction Apache Nutch is a production ready web crawler which relies on Apache ...

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Apache Tomcat Generate Csr Tutorial

A public key infrastructure (PKI) is a set of roles, policies, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates and manage public-key encryption. In Public Key Infrastructure (PKI) systems, a Certificate Signing Request also CSR or certification request is a message sent from an applicant to a Certificate Authority in order to apply for a ...

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How to Add a Servlet Module to Your Confluence Add-on

This article will show you how to add a Servlet Module to your Confluence add-on. This article builds upon the previous article “How to Add a Space Admin Screen to Your Confluence Add-on”. Make sure you have read it and tried the example because this tutorial will add code to it. Are you ready? 1. Requirements You will require the ...

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Docker Swarm Tutorial

1. Introduction This post introduces Docker Swarm – the Docker Engine’s Swarm mode. The Swarm mode enables multiple machines running Docker Engines to collaborate in a cluster. Let us explore the basics of this.        To follow the examples provided here you will need Docker Engine 1.12 or above to be installed in your machine. You will also need to install VirualBox, ...

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Apache Tomcat Rewrite Rules Example

The rewrite valve implements URL rewrite functionality in a way that is very similar to mod_rewrite from Apache HTTP Server. uses a rule-based rewriting engine, based on a PCRE regular-expression parser, to rewrite requested URLs.                   URL rewriting is a technique called URL rewriting that can turn unsightly URLs into nice ones. ...

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How to Add a Space Admin Screen to Your Confluence Add-on

Have you read my past articles on Atlassian Confluence Add-on Development? Yes? Cool! Now that you have created an add-on, you might want to add a Space Admin Screen to your Confluence Add-on to add some configuration or behavior to it. Read on and together we will add a Space Admin Screen to your Confluence Add-on. 1. Gather the Tools ...

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Selenium Keyboard Events Example

Bipartite Graph

1. Introduction In this tutorial we will be discussing about the Advance User Interactions API. Using these APIs, we can perform actions on a web page similar to a user would interact on the user using keyboard and mouse.                 The Actions interface and Action classes are two modules of the API that ...

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Apache Hadoop Knox Tutorial

In this tutorial, we will learn about Apache Knox. Knox provides the REST API Gateway for the Apache Hadoop Ecosystem. We will go through the basics of Apache Knox in the following sections.                     1. Introduction Apache Knox is the open source project under Apache Software Foundation similar to most other ...

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Jenkins Docker Image Example

1. Introduction In this post we will learn about how to install and configure Jenkins through the Jenkins Docker image. This is the official Docker image of Jenkins available from the Docker hub here. Please ensure that you have Docker engine and Docker-Compose installed to try out the examples provided in this post.           2. Install ...

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