Hello guys, you might have heard about DevOps and all the attention it is getting now. DevOps is a new phenomenon, and there is a mad race among senior developers to become a DevOps engineer. Well, I am not one of them as my passion is for becoming a software architect, but I have indeed spent some time learning DevOps just to increase my knowledge of the field as I strongly believe in the phrase, jack of all and master of one :-). In the DevOps world, tools matter a lot, and the whole of the DevOps phenomenon to create an automated pipeline for delivering quality software heavily relies on clever uses of tools like Maven, Jenkins, Docker, Kubernetes, and others. If you are learning DevOps for one reason or another and looking for some excellent courses to kick-start your journey, then you have come to the right place. In this article, I am going to share some of the best DevOps courses which are also free and cover essential tools like Maven, Jenkins, Docker, and Kubernetes, which every DevOps Engineer should know. These courses are definitely not in-depth but will provide you enough knowledge to start and work on your project and also to explore more, which is very important for beginners. Also, don't think that because these are free courses, they are of poor quality. Most of these courses are presented by the experienced instructor which is expert in the DevOps field and knows what they are talking. These courses are just made free of marketing and educational reasons. Most of the time, the Instructor also covers their free course to paid one once they reach their promotional target, particularly in Udemy. o please be aware of that and check the price before you join the class. Btw, if you are just looking for one course which covers basic DevOps and most of these tools, then I suggest you join Master in DevOps: Docker Jenkins GIT CI Pipeline and Maven course in Udemy. This is not free, but you can get it within just $10 in many flash sales of Udemy, and it's well worthy of your time. 5 Best Free Udemy Courses to Learn Maven, Jenkins, Docker, and Kubernetes in 2025 There are a lot of free online courses, books, and tutorials available on the internet, but I have chosen only 5of them and that too to learn different tools from a DevOps perspective. These courses will teach you to build tools like Maven, CI/CD tools like Jenkins, Containers like Docker, and Container management technology like Kubernetes, and build too like Apache Maven or Gradle. Once you learn these tools, you should be able to more comfortable working as a DevOps professional. You should also be able to implement DevOps in your project. Without any further ado, here is my list of some of the free courses to learn essential DevOps tools like Maven, Jenkins, Docker, and Kubernetes. 1. JENKINS Beginner Tutorial - Step by Step [Free] There is no doubt that Jenkins is an integral part of the DevOps toolchain. It is probably the most essential tool, and it exists much before the DevOps phenomenon started. Some people actually credit Jenkins for starting DevOps because it was this tool that first introduced automated build and deployment for Java projects. Anyway, talking about this course, it's a fantastic course to build, deploy, and testing with Jenkins 2.0. The course is free, and it has 4.3 ratings on average on Udemy from more than 33K students, which speaks a lot about its quality. Instructor Karthik KK is both enthusiastic as well very clear. The lessons are also fast-paced but well explained and to the point, which means you will learn a lot in a quick time. I learned a lot. If you don't like a fast-paced course, you can also slow down the speed to go as per your convenience. In short, it is the fastest, most engaging, and most explicit free course about Jenkins. 2. Containers 101 [Free] Containers like Docker are again an essential part of DevOps, as it allows them to scale quickly, set up a new environment with a click of buttons, and abstract the Harward part from an application. Good knowledge of containers is essential for DevOps professionals, and that's where this course helps. Again, the course is free, at least at the time of this writing, and got on average 4.3 ratings from more than 7.5K students. In this course, you will learn about how to build and deploy applications to modern container platforms with Kubernetes, Docker, and Helm. It contains more than 6 hours of content, so it's no mean a short course. Actually, it's a collection of recorded webinars, but the content is excellent and gives a good overview of Docker and Docker Compose. Notably, the best practices and implementation tips are fantastic. 3. Maven Quick Start: A Fast Introduction to Maven by Example [Free] Some people may argue that Gradle is a better tool than Maven, and that may be true, but we can't ignore Maven's importance and presence in the current software development world. It's without a doubt the most common build tool and dependency management system, and most of the companies and startups use Maven for building their project, and that's what makes it essential for DevOps engineers. Talking about the course, it's a free course with 3 hours of content. It has got, on average, 4.4 ratings from almost 20K students who are quite impressive. The course provides a step-by-step guide to learn Apache Maven. You will learn about core concepts, how to use Maven with Eclipse, build Java projects using Maven, Integrate Git source control with Maven, and find and manage dependencies in Maven. In short, a perfect course to learn Maven for Java developers and DevOps engineers. 4. Getting Started with Google Kubernetes Engine [Coursera Free Course] Along with Docker, Kubernetes is another awesome and essential tool for DevOps engineers. Almost all microservice-based applications are now using Kubernetes for scaling, and that's why you need to understand and master Kubernetes. The course will teach you how to deploy, manage, and scale dockerized apps in Kubernetes, a fantastic product from Google, which helps deploy software or web applications, scaling, and management of containerized applications. It also touches based on the deployment in the cloud using Google Cloud. Talking about the course, this is a free course on Coursera, offered by Google Cloud, and provides 6hours of content. It has amassed 4.5 ratings of around 30,000 students, which is very impressive. Btw, like many other free Coursera courses, it won't provide you any certification. If you want a certificate, then you need to purchase the course, which will then also give you access to many quizzes, assessments, and peer reviews. You can even show that certificate in your LinkedIn profile, which can also attract a lot of recruiters looking for these cutting-edge skills. You an also join Coursera Plus, a subscription plan which gives unlimited access to more than 5000+ Coursera courses and professional certificates. 5. HANDS-ON DOCKER for JAVA Developers [Free] Along with Jenkins, Docker is probably the most essential tool for DevOps engineers. It's also the most popular container available to deploy your Microservices in Java or any other programming language and technology stack. Talking about the course, it's again a fantastic free online course from Udemy, created by Sinduja Sundaaraju and contains more than 4 hours of content, which may sound less, but it's packed with a lot of information. Here are key things you will learn in this course: Fundamentals of Virtualization and containerization How to build, deploy, and run Java application using Docker How to build Spring Framework application using DockerThe course is also very hands-on, and you will immediately start using Docker if you follow along. You will first learn how to install and configure Docker and then move to more advanced topics like building custom images using Dockerfile, managing images and containers and understanding container life-cycle, etc. More importantly, the course is completely free and has, on average, 4.5 ratings from 31,000 students, which is very impressive. The instructor is also an expert and very clear and confident. In short, an excellent free course to start with is Docker, the very container one is using. There is another excellent free course on Coursera to learn DevOps and Continuous Delivery, offered by the University of Virginia. If you need a DevOps Certification and like Coursera courses then you can also check out that course, it's worth your time and has got some rave reviews. That's all about some of the best Udemy courses to learn DevOps in 2025 and some of the essential tools like Jenkins, Maven, Docker, and Kubernetes for DevOps developers. As I have said, DevOps is a new phenomenon, but DevOps engineer is very high in demand, and if you want to give your career a boost, you should spend some time learning DevOps and enhancing your profile. Other Programming Articles you may like The 2025 DevOps Developer RoadMap Top 5 Courses to Learn Jenkins for Java Programmers 10 Tools Every Java Developer Should Know 5 Free Courses to Learn Kubernetes in Depth The 2025 Java Developer RoadMap 10 Programming languages You can Learn in 2025 10 Free Courses to Learn Docker in Depth 10 Tips to become a better Java Developer in 2025 10 Reasons to Learn Java Programming languages 15 Courses to learn Docker, Kubernetes, and AWS Top 5 Java Frameworks to Learn in 2025 10 Testing Libraries Every Java Developer Should Know 15 Best AWS, Docker, and Kubernetes Courses 13 Best DevOps Courses for Experienced Developers Thanks for reading this article so far. If you like these best free DevOps courses to learn essential DevOps tools like Jenkins, Docker, Kubernetes, and Maven, then please share them with your friends and colleagues. If you have any questions or feedback, then please drop a note. P. S. - If you are just looking for one course which covers basic DevOps and most of these tools, then I suggest you join Master in DevOps: Docker Jenkins GIT CI Pipeline and Maven course in Udemy. This is not free, but you can get it within just $10 in many flash sales of Udemy, and it's well worthy of your time.