Java DevOps

Organizations working on the Java EE stack are trying harder than ever to make Java DevOps a reality. By bringing together development and operations teams, Agile software development is streamlined, test automation becomes easier to achieve and the implementation of continuous integration (CI) and continuous delivery (CD) streams can become a reality when Java DevOps is done right.

Top Stories

Quiz 29 Sep 2022
10 tough Agile quiz questions for software developers

Ready to embrace Agile for your software development projects? Take this quiz to gauge your grasp of the basics of Agile, and the core values and principles of the Agile Manifesto. Continue Reading
Feature 21 Sep 2022
Forward proxy vs. reverse proxy: What's the difference?

Forward and reverse proxies secure and isolate resources that reside on a private network, but they play different roles in modern enterprise architectures. Continue Reading

Blog Post 28 Oct 2022

Hands-on Kubernetes interview questions

Review these in-depth Kubernetes interview questions and answers to showcase your applied knowledge of Kubernetes and container orchestration. Continue Reading
Blog Post 12 Oct 2022

My five-point ranking system to evaluate tech candidates

Worried about hiring the wrong tech candidate? Here's a tried and true, five point evaluation system that has regularly proven itself in the field. Continue Reading
Blog Post 05 Oct 2022

Taking REST APIs to the next level with hypermedia and HATEOS

Adding hypermedia links to REST APIs expands resource data abilities and improves users' experience. This walkthrough explains the ins and outs of REST APIs with hypermedia and the HATEOS technique. Continue Reading
Quiz 29 Sep 2022

10 tough Agile quiz questions for software developers

Ready to embrace Agile for your software development projects? Take this quiz to gauge your grasp of the basics of Agile, and the core values and principles of the Agile Manifesto. Continue Reading
Blog Post 28 Sep 2022

Understanding the Kubernetes Container Runtime Interface

The Kubernetes Container Runtime Interface adds options beyond Docker for container orchestration. Here's a rundown of how Kubernetes and the CRI work. Continue Reading
Feature 21 Sep 2022

Forward proxy vs. reverse proxy: What's the difference?

Forward and reverse proxies secure and isolate resources that reside on a private network, but they play different roles in modern enterprise architectures. Continue Reading
Tip 15 Sep 2022

Agile vs. Waterfall: What's the difference?

The contrasts between Agile and Waterfall are stark. Here we compare these two popular development methods, and show you the key differences between Waterfall versus Agile. Continue Reading
Blog Post 13 Sep 2022

Hierarchical Kubernetes namespaces explained by example

Confused by hierarchical namespaces in Kubernetes? In this Kubernetes tutorial we'll examine what hierarchical namespaces are, how to add them to a Kubernetes cluster and then how to use them. Continue Reading
Blog Post 02 Sep 2022

10 Agile takeaways from the latest Scrum Guide

Learning the Scrum basics? Need a quick Scrum overview? Here are 10 interesting facts from the latest Scrum guide that every Agile developer needs to know. Continue Reading
Blog Post 10 Jul 2022

What is a Scrum commitment?

What are the 3 Scrum commitments and why do we need them? Most importantly, Scrum commitments provide transparency and focus, but their role in Agile software development goes far beyond that. Continue Reading
Blog Post 08 Jul 2022

Agile vs DevOps: What's the difference?

Wondering how to choose between Agile or DevOps? You're in luck, but it's not about DevOps versus Agile. It's about how Agile and DevOps work together. Here we examine the similarities and ... Continue Reading
Blog Post 12 Jun 2022

How to setup the Nginx Proxy Manager Docker example

Learn how to setup and install the Nginx Proxy Manager from Docker Hub. This simple tool greatly simplifies the configuration of Nginx reverse proxy servers, asset caching, host redirecting and SSL ... Continue Reading
Blog Post 11 Jun 2022

Example Java String palindrome checker program using recursion

There are many ways to write a Java String palindrome program. In this Java palindrome example we demonstrate recursion and how the use of loops, arrays, Scanner and the reverse method can improve ... Continue Reading
Blog Post 10 Jun 2022

Java array size, length and loop examples

How do you find the size of a Java array? How do you size Java arrays when you create them? And is the Java array size fixed? Here we answer all of your questions about the size of a Java array. Continue Reading
Blog Post 10 Jun 2022

How do I install Java?

To install Java the right way, there are a few things to know. Just sort out the perquisites and you'll be able to install Java and the JDK in no time flat. Continue Reading
Blog Post 09 Jun 2022

How to run a Jar file

How do you run a JAR file on Windows, Mac or Linux? Double click the JAR? Run the JAR at the command line? Several approaches will work if you have Java or the JDK installed. Continue Reading
Blog Post 05 Jun 2022

How do I 'docker copy' a file from container to host?

Here's a quick example of how to copy a file inside a Docker container to the local filesystem of the host machine. With the ID or name of the container in hand, a Docker file copy operation is an ... Continue Reading
Blog Post 04 Jun 2022

How to install Docker and docker compose on Ubuntu

Modern day development happens in containers. Which is why it's imperative that you know how to setup and install Docker and docker compose on your local Ubuntu workstation. In this tutorial, we'll ... Continue Reading
Blog Post 01 Jun 2022

How do I install Java on Ubuntu?

Here's the easiest way to install Java on Ubuntu with apt. Follow these steps and you'll get the JDK installed in no time, and be ready to use your Java on Ubuntu setup right away. Continue Reading
Blog Post 31 May 2022

How can business leaders and IT improve communication?

The days when companies could afford to treat IT as simply the department that keeps the computers running are long gone. Technology delivers massive value to business leaders. Business ... Continue Reading
Blog Post 28 May 2022

How to setup an Nginx reverse proxy server example

Here's a quick tutorial to setup an Nginx reverse proxy server. This example uses an Apache Tomcat server but the config settings apply for other backend app servers such as Node, Express, ... Continue Reading
Blog Post 28 May 2022

How to git push an existing project to GitHub

If you stared development before version control was set up, you may need to push your development project to an existing GitHub repo. This Git and GitHub example will show you the fastest way to ... Continue Reading
Blog Post 27 May 2022

How to setup PHP on Nginx with fastCGI (PHP-FPM) example

Here's a quick tutorial on how to setup Nginx with PHP support. The key? The installation of fastCGI, aka PHP-FPM, so Nginx can serve PHP files to clients. Continue Reading
Blog Post 24 May 2022

Create a GitHub Personal Access Token example

This walkthrough shows how to generate a GitHub personal access token, and use the GitHub personal access token to clone, pull, fetch and push changes back to your GitHub repository. Continue Reading
Blog Post 24 May 2022

How to customize Git Bash Shell prompt settings

Want to style and customize your user and hostname properties that display in the Git Bash prompt? This quick example shows you how to quickly customize your Git Bash terminal window. Continue Reading
Blog Post 20 May 2022

Docker run vs docker-compose: What's the difference?

Both docker run and docker-compose can be used to start Docker containers, but there are key differences between the two. Here we explore the differences between docker-compose and docker run, and ... Continue Reading
Blog Post 19 May 2022

Git commit config and credential confusion causes consternation for customers

A user who accidentally provides a GitHub username and password instead of the Git username and email address may have inadvertently published their security credentials to the world. Continue Reading
Blog Post 18 May 2022

Dockerfile vs docker-compose: What's the difference?

What's the difference between Dockerfile and docker-compose? These simple examples compare Dockerfile, the docker-compose.yaml file and important commands to build Docker images and run Docker ... Continue Reading
Blog Post 17 May 2022

How to setup an Apache reverse proxy server example

Most enterprise architectures use Apache as a reverse proxy, but it is not configured for that by default. In this quick tutorial, we show you how to configure an Apache reverse proxy for backend ... Continue Reading
Blog Post 17 May 2022

How to use docker-compose with Apache httpd example

Want to configure and run an Apache httpd Docker container to serve website files from a local system? This example shows the best way to do that, using the "docker-compose" command and YAML file. Continue Reading
Blog Post 17 May 2022

Deploy your website with a Docker Apache httpd container volume

The best way to run Docker's httpd Apache web server image is to map a volume that points to local files on your hard drive. This example shows you how to run Apache in Docker without the need to ... Continue Reading
Blog Post 17 May 2022

How to dockerize Apache httpd websites example

Need to dockerize Apache? Want to build a custom Docker httpd image that hosts your website? Here's a simple Apache Dockerfile example to build a custom httpd Docker image for your website. Continue Reading
Blog Post 18 Apr 2022

Being Agile vs. doing Agile: What's the difference?

What's the difference between being Agile and doing Agile? It's subtle, but it's significant. Here we compare them and show you how to both be Agile and do Agile the right way. Continue Reading
Blog Post 14 Feb 2022

Noon is not 12am. Midnight is not 12pm. Code appropriately.

The terms 12am and 12pm make no logical sense. Neither one is noon or midnight. Remove the 12am vernacular from your applications. Users will thank you. Continue Reading
Blog Post 26 Jan 2022

How to create an AWS account alias

Need to create, change or rename an AWS account alias? It's not too hard to do, and your users will thank you. Here are the steps to do it. Continue Reading
Blog Post 25 Jan 2022

Why is the Bootstrap grid system 12 columns wide?

Ever wonder why they created a 12-column Bootstrap grid system, and not 10 or 15? It's the same reason there's 60 seconds in a minute, or 360 degrees in a circle. Continue Reading
Blog Post 23 Jan 2022

Comparing Rest vs GraphQL on performance and ease of use

The problem with RESTful web services that use JSON or XML as a data exchange is bloat and verbosity. Compare REST vs GraphQL performance if you want to simplify your web API development. Continue Reading
Blog Post 21 Jan 2022

Why we use ./ (dot slash) to run Linux scripts?

Ever wonder why you need a ./ before a Unix shell script or command of your own in order to run it? Here's what the Linux dot slash does and why Unix systems require the ./ syntax. Continue Reading
Blog Post 21 Jan 2022

Fix Apache's 'ServerRoot Must be a Valid Directory' error quickly

Here are three easy ways to fix Apache's ServerRoot Must be a Valid Directory error. Any of these remedies will get your Apache HTTP server running again. Continue Reading
Blog Post 19 Jan 2022

Principle of least privilege examples & best practices

We see examples of the principle of least privilege everywhere in our daily lives. What does the principle of least privilege mean as applied to security in software development and DevOps? Continue Reading
Blog Post 16 Jan 2022

Quickly set up GitHub SSH example

Here's a very quick example of how to setup GitHub SSH keys and use them to perform Git clone, push and pull commands over a securely configured SSH connection. Continue Reading
Blog Post 15 Jan 2022

How to install Apache's Web Server on Windows 10 quickly

Let me step you though the installation of Apache's Web Server on Windows 10. You'll learn how to install Apache 2.4 on Windows, and avoid common httpd config errors. Continue Reading
Blog Post 14 Jan 2022

Top 5 AWS root account best practices

The credentials of your server's super user must be protected at all costs. Here are five AWS root account best practices to protect yourself from being hacked. Continue Reading
Blog Post 14 Jan 2022

BitBucket SSH key generation tutorial

This simple and straight-forward example shows you how to quickly configure BitBucket SSH keys, so you can connect Git to BitBucket with a secure shell (SSH). Continue Reading
Blog Post 14 Jan 2022

How to create and run a shell script in Linux and Ubuntu

It's not hard to create and run a shell script in Linux distros like Ubuntu, but there are a few non-obvious pitfalls you need to avoid. Here's a quick example of how to execute a script in Linux. Continue Reading
Blog Post 13 Jan 2022

Git securely with a GitHub SSH URL example

Where do you find the GitHub SSH URL? How do you use it to clone or pull from your remote GitHub repository? This quick Git tutorial shows you everything you need to know about the GitHub SSH URL. Continue Reading
Blog Post 12 Jan 2022

Quick GitHub 'Permission denied (publickey)' SSH error fix

Here are the three most common fixes to the GitHub 'Permission denied (publickey)' error over SSH. Continue Reading
Blog Post 11 Jan 2022

A quick GitLab SSH key configuration example

To connect Git operations securely to your GitLab repository, you will need to configure GitLab SSH keys both locally and remotely. Here's a quick example of how to do it. Continue Reading
Blog Post 11 Jan 2022

How to SSH into GitHub on Windows example

Here's a quick tutorial to connect to GitHub with SSH on Windows. It's easy, and you'll establish a GitHub SSH Windows connection with Git in no time. Continue Reading
Blog Post 11 Jan 2022

A quick GitHub SSH clone example

Here's a quick example of how to perform a GitHub SSH clone operation. In just five minutes, learn how to create SSH keys, configure them in GitHub and perform the GitHub clone with SSH keys in Git. Continue Reading
Blog Post 08 Jan 2022

How chmod numbers work explained by example

Don't let yourself be intimidated by chmod numbers and permissions. Here's a quick and easy to understand explanation of how chmod permission numbers work in Linux. Continue Reading
Blog Post 05 Jan 2022

Was GitHub's password authentication removal an overstep?

Was GitHub's removal of password based authentication a security overstep? If it makes it harder for developers to get started with Git and GitHub, it was. Continue Reading
Blog Post 02 Jan 2022

Git and GitHub SSH KeyGen by Example

Here's a quick example of how to securely connect Git to GitHub with SSH KeyGen produced secure shell keys on both Windows and Linux. Continue Reading
Blog Post 31 Dec 2021

How to quickly change your branch in Git

These Git branch change examples will help you quickly address the specific version control challenge you are trying to solve, be it a branch renaming or a switch, list and checkout of existing ... Continue Reading
Blog Post 29 Dec 2021

Fix Putty's 'Key Exchange Algorithm Agreement' error

Ever encounter the 'Couldn't Agree a Key Exchange Algorithm' error when you fail to connect with Putty to an AWS EC2 instance or other server-side resource? This is the first fix you should try. Continue Reading
Blog Post 06 Dec 2021

Learn how Kubernetes Operators work from this example

Kubernetes (K8S) has become a very popular technology for working with distributed applications that run on the internet. K8S is intended to support an enormously large number of Linux containers ... Continue Reading
Tutorial 01 Dec 2021

How to revert a Git commit: A simple example

The git revert command is commonly misunderstood. In this quick tutorial, we will show you exactly how the command works and how to perform a simple undo in your repo. Continue Reading
Blog Post 01 Dec 2021

How to find and use a GitHub URL by example

This example shows you how you can find and use the GitHub URL. Clone, fetch, push and pull to your remote repo easily with the GitHub URL at your disposal. Continue Reading
Blog Post 29 Nov 2021

Kubernetes vs Docker Compose: What's the difference?

Confused between the difference between Kubernetes and Docker compose? Here we explain how the two DevOps construct are similar, and how they are different. Continue Reading
Blog Post 29 Nov 2021

How to delete a Git repository

Trying to delete a local Git repository but the DVCS system still persists? Here's a quick example of how to locally remove a Git repo permanently and completely. Continue Reading
Blog Post 29 Nov 2021

How to import a Maven project from GitHub into Eclipse

Here's a quick tutorial that shows you how to import a GitHub hosted Maven project into the Eclipse IDE. Continue Reading
Blog Post 29 Nov 2021

What is the difference between Docker and containerd?

What's the difference between containerd and Docker? Here we take a look at how these two cloud-native Kubernetes friendly technologies differ and compare. Continue Reading
Blog Post 29 Nov 2021

What is the difference between kubectl and kubelet in Kubernetes?

Are you working in a cloud-native, Docker and Kubernetes based environment and you're wondering what the difference is between kubelet and kubectl? Here we clear up the kubectl vs kubelet confusion. Continue Reading
Blog Post 02 Nov 2021

How to delete all Git branches except master or main exampleb

Here is a quick Git command to delete all branches except master or main from your local repository. It's a nice way to clean up your workspace after a milestone or a sprint. Continue Reading
Blog Post 31 Oct 2021

What is the difference between a Docker image vs a container?

Wondering what the difference is between a Docker image and container? Here we make the Docker container vs image comparision and show you how the two concepts differ. Continue Reading
Blog Post 31 Oct 2021

Uncommit Git's Last Commit Example

Need to do a git uncommit to the last commit you were working on? Learn how to quickly uncommit files updates and changes in Git. Continue Reading
Blog Post 28 Oct 2021

How to fully delete remote Git branches from GitHub

Learn the command to properly delete remote Git branches from tools such as GitHub and GitLab, while also deleting local remote tracking branches as well. Continue Reading
Blog Post 25 Oct 2021

Fix Git's "fatal: no upstream branch" error quickly example

Here's a quick fix for Git's "fatal: The current branch has no upstream branch" error, along with a brief explanation of why this happens when you push a new Git branch to GitHub, GitLab or BitBucket. Continue Reading
Blog Post 23 Oct 2021

How to discard your local changes in Git example

Don't let a file or two be overlooked when you attempt to remove and discard local, uncommitted changes in Git. Learn how to locally revert and remove uncommitted changes to files in Git properly. Continue Reading
Blog Post 22 Oct 2021

How to remove Git branches from your repository

Need to permanently remove a Git branch locally? What about the remote tracking branch? Or maybe someone removed a Git branch on GitHub or GitLab and you need to synchronize with the server? Here ... Continue Reading
Blog Post 13 Oct 2021

How to rename and change a Git branch name locally & remotely

Here's a quick example that shows you how to rename a Git branch locally and remotely. The branch renaming commands and techniques will work with GitHub, GitLab, Bitbucket and any cloud based Git ... Continue Reading
Blog Post 11 Oct 2021

4 ways to create a Git branch quickly by example

Forgotten the Git branch create command? Here we'l show you four different ways to create a Git branch, be it from the current branch, from a tag or from a commit id. Continue Reading
Blog Post 10 Oct 2021

How to delete a Git branch locally

Here's a quick example of how to delete local Git branches from your workstation without deleting remote branches in your GitHub or GitLab repos. Continue Reading
Blog Post 06 Oct 2021

How to tag a Git commit id by example

Here's a quick example of how to tag a specific commit id in Git. This is perfect if an older commit id requires a tag but was not originally given one. Continue Reading
Blog Post 03 Oct 2021

How to push new Git branches to remote repos on GitHub or GitLab by example

Did you create a new Git branch? Need to push that new Git branch to a remote repo such as GitHub or GitLab? This Git example tutorial shows you how to push new branches to remotes. Continue Reading
Blog Post 02 Oct 2021

Create a new Git branch with current local changes saved by example

Did you update some code in the wrong Git branch? Here's how to save those local changes in a newly created Git branch, and clean up the original branch in the process. Continue Reading
Quiz 08 Sep 2021

A monolithic vs. cloud-native migration quiz for developers

Are you prepared for a cloud-native migration? This quiz contrasts the microservice vs. monolithic approaches to software development and will help gauge your knowledge. Continue Reading
Blog Post 31 Aug 2021

When to you Docker vs Podman? A developer's perspective

Docker and Podman play two very separate and distinct roles in the modern DevOps pipeline. Here we compare Docker and Podman and show you how to choose which one is best for you. Continue Reading
Blog Post 31 Aug 2021

Fix GitHub's 'support for password authentication was removed' error

Frustrated by GitHub's 'support for password authentication was removed' error? Here's how to fix it by creating a personal access token in GitHub. Continue Reading
Answer 28 Jul 2021

Git fork vs. clone: What's the difference?

Both Git fork and clone create copies of a repository, but they offer drastically different levels of access, isolation and control over the target repo. Continue Reading
Answer 27 Jul 2021

Kubectl apply vs. create: What's the difference?

The Kubernetes command-line tool, kubectl lets you control your Kubernetes clusters. But two of its operations -- apply and create -- can often be confused. Continue Reading
Answer 26 Jul 2021

Vagrant vs. Docker: How these cloud-native tools differ

Both Docker and Vagrant are important parts of a cloud-native stack, but they have very different roles when it comes to supporting containers and VMs within the CI/CD process. Continue Reading
Quiz 20 Jul 2021

Introduction to Docker quiz

These Docker questions and answers will test your knowledge of the fundamentals of Docker, but it won't be easy. Take this quiz and see if we can stump you. Continue Reading
Blog Post 20 Jul 2021

How to fork a Git repository

Looking for the fork command in Git? Well, it doesn’t exist. Here we'll show you how to fork a Git or GitHub repo on your own. Continue Reading
Blog Post 19 Jul 2021

How to download an older, specific version of UiPath Studio

Want to stop UiPath Studio from updating to the latest release all the time? Here's how to download and install a specific version of UiPath Studio. Continue Reading
Blog Post 02 Jul 2021

How to download and install UiPath Studio

It’s actually a bit tricky to install UiPath. This UiPath Studio install tutorial shows you how to find the download link and the right version. Continue Reading
Blog Post 30 Jun 2021

How to pass variables as UiPath arguments example

How do you use a variable from one UiPath sequence in another? This tutorial will teach you everything you need to know about passing data between workflows. Continue Reading
Blog Post 28 Jun 2021

How to use the UiPath Switch activity

While the UiPath If activity is great for simple logic, multi-branching demands the UiPath Switch activity. Learn how to use it to perform conditional logic. Continue Reading
Blog Post 25 Jun 2021

UiPath If-Then conditional statements

Learn how to use the conditional UiPath If activity to create branches of logic in your RPA programs. This quick UiPath If-Then example will show you how. Continue Reading
Blog Post 20 Jun 2021

What is a Git fork? Meaning, definition and a Git Fork example

Need to fork GitHub at the command line? This quick Git tutorial will show you how to install the GitHub CLI tools and fork a repository in the shell. Continue Reading
Feature 16 Jun 2021

How enterprises are building inclusive language in code

Inclusive language in code is just one step towards a diverse community, but it's a good place to start. It's a conversation more and more open source enterprises are tackling. Continue Reading
Feature 04 Jun 2021

Learn how to save to local storage in this git stash tutorial

Sometimes developers need to jump off the main distributed development branch to local storage. Follow this git stash tutorial to learn the ins and outs of this Git command. Continue Reading
Blog Post 02 Jun 2021

Quickly create a Git bare repo with init or clone example

There are two ways to create a bare Git repo -- a bare Git clone or a Git init bare. This git bare repo tutorial will show you how to perform both. Continue Reading
Opinion 27 May 2021

Lessons from Fluentd: How to name a project in the SEO age

Dreaming of wide-scale adoption for your new project? You'll need the right name. Here's how Fluentd got its name, and what you can learn from its SEO-driven process. Continue Reading
Answer 26 May 2021

Terraform vs. Ansible: How do these DevOps tools differ?

There is some overlap between the two tools, but they really should coexist. Here we show you where Ansible and Terraform fit into your cloud-native, DevOps stack. Continue Reading
Blog Post 21 May 2021

How to use git submodules tutorial with examples

If you’re wondering how to git submodule and logically link repositories together, this git submodule tutorial -- with lots of examples -- is for you. Continue Reading
Blog Post 21 May 2021

How to update Git submodules

If your Git submodule is out of sync with the server, we can help. This git submodule update example shows you how to get the latest commits into your worktree. Continue Reading
Answer 20 May 2021

Is a Docker or Kubernetes certification worth it?

Some DevOps professionals shun industry certifications. But in the cloud-native world, Docker and Kubernetes certifications make prospective job candidates stand out from the rest. Continue Reading
Opinion 17 May 2021

How technologists should approach professional development

Old approaches to professional development don't stand up to the pace of change in the cloud-native world. Here's how DevOps professionals can cope. Continue Reading
Tip 30 Apr 2021

10 Jenkins alternatives for developers

Looking for an alternative to Jenkins in your CI/CD environment? Consider options from Atlassian, GitLab, Spinnaker and more to see if they better fit your development needs. Continue Reading