What is Jenkins?

Jenkins is an open-source, and free service that is used for the automation of the software development process. Jenkins helps to automate the non-human element of the process of software development, with continuous integration and promoting the technical areas of continuous software delivery. Jenkins is a server-based software system that runs in servlet containers such as Apache Tomcat. It supports various version control tools, which are CVS, AccuRev, Subversion, Mercurial, Git, Perforce, ClearCase, TD/OMS, and RTC, and can run Apache Maven, Apache Ant, and projects that are based on sbt as well as inconsistent shell scripts and Windows batch commands. Jenkins was developed by Kohsuke Kawaguchi and was released under the MIT software License, Jenkins is free software.

Software Builds can be triggered by several means, for example by committing to a version control system, by automating and scheduling through a cron-like mechanism and by requesting a specific build URL. It can also be triggered after the other software builds in the queue have been completed. Jenkins's functionality can be further extended with plugins.

The Jenkins project was initially named Hudson project but was later renamed after a conflict with Oracle, which had forked the project and claimed rights to the project name. The Oracle fork of Hudson continued to be developed for the time being before being donated to the Eclipse Foundation.

Jenkins is a very powerful software application that allows for the continuous integration and continuous delivery of software projects, not minding the platform that you are working on. It is a free and open-source project that can handle any kind of software build or continuous integration. You can integrate Jenkins together with a number of testing and deployment technologies.

Jenkins presents software developers with a fast and easy way to set up a continuous and constant integration or continuous delivery environment for almost any mix of software programming languages and source code repositories by using pipelines, as well as automating other regular software development tasks. While Jenkins does not take away the need to develop scripts for individual steps, it presents you with a faster and more robust way to integrate your entire chain of tests, build, and deployment tools than you can easily do on your own.

Jenkins was first created as the Hudson project. Hudson's development kicked off in the summer of the year 2004 at Sun Microsystems. It was first released to the public in java.net in the year Feb. 2005.

Around the year 2007 Hudson started to be chosen as a better alternative to Cruise Control and other open-source build-servers. At the annual JavaOne conference in the month of May, the year 2008 the software won the Duke's Choice Award in the category of Developer Solutions.

During the month of November, the year 2010, a big issue surfaced in the Hudson community based on to the infrastructure that was used to build Hudson, the issue grew to include questions over the management and control by Oracle. Negotiations between the core project contributors and Oracle happened, and even though there were tons of areas of agreement, an important point was the trademarked name "Hudson," after Oracle got the right to the name and applied for a trademark in December 2010. As a result of the application, in the month of  January 11, 2011, a call for votes was made to transform the project name from "Hudson" to "Jenkins." The proposal was very much approved by community vote in the month of January 29, 2011, thereby kicking off the Jenkins project.

In the month of February 1, 2011, Oracle announced that they still want to continue the development of Hudson, and saw Jenkins as a fork rather than a rename. Jenkins and Hudson have therefore continued as two very independent projects, each claiming that the other is the fork. As of the month of June 2019, the Jenkins organization on GitHub had 667 project members and around 2,200 public repositories, as compared with Hudson's 28 project members and 20 public repositories with the last update in 2016.

Features of Jenkins

There are many features of Jenkins, and some of them are:

1. Jenkins is hosted internally.

2. Jenkins is a free and open-source software project.

3. Jenkins allows for tons of integrations with other development stacks.

4. Jenkins has a rich set of plugins in its library for additional functions.

5. Jenkins has support for several build pipelines.

6. Jenkins has a workflow plugin.

7. Jenkins is very easy to setup.

Benefits of studying Jenkins

There are many benefits of Jenkins and some of them are;

1. Jenkins is an open-source software tool that has great community support.

2. Jenkins is very easy to install.

3. Jenkins has over 1000 plugins to facilitate and ease your work. If a plugin does not exist, you can develop it yourself and share it with the community.

4. It is free to use.

5. Jenkins is developed on Java, therefore, it is made portable to all the major platforms.

6. Learning Jenkins can provide Job Opportunity and Career Advancement for you.

7. Learning Jenkins can provide Entrepreneurship Opportunity and Consultancy.

Jenkins Course Outline

Jenkins - Introduction

Jenkins - Overview

Jenkins - Installation

Jenkins - Tomcat Setup

Jenkins - Git Setup

Jenkins - Maven Setup

Jenkins - Configuration

Jenkins - Management

Jenkins - Setup Build Jobs

Jenkins - Unit Testing

Jenkins - Automated Testing

Jenkins - Notification

Jenkins - Reporting

Jenkins - Code Analysis

Jenkins - Distributed Builds

Jenkins - Automated Deployment

Jenkins - Metrics and Trends

Jenkins - Server Maintenance

Jenkins - Continuous Deployment

Jenkins - Managing Plugins

Jenkins - Security

Jenkins - Backup Plugin

Jenkins - Remote Testing

Jenkins - Exams And Certification

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