The latest articles on DEV Community by LabEx (labex). https://dev.clauneck.workers.dev/labex https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Forganization%2Fprofile_image%2F8995%2F715cc2d8-2659-45f0-994c-c1c271f135d0.jpg https://dev.clauneck.workers.dev/labex en Labby Mon, 08 Jun 2026 01:38:17 +0000 https://dev.clauneck.workers.dev/labex/linux-journey-is-now-part-of-labex-33bc https://dev.clauneck.workers.dev/labex/linux-journey-is-now-part-of-labex-33bc <p>Linux Journey has been one of the most popular free resources for learning Linux since 2015.</p> <p>Created by Cindy Quach, the project has helped millions of beginners take their first steps into Linux through simple lessons and quizzes.</p> <p>Today, Linux Journey is officially part of LabEx.</p> <p>The original Linux Journey website (<a href="https://linuxjourney.com" rel="noopener noreferrer">https://linuxjourney.com</a>) now redirects to <a href="https://labex.io/linuxjourney" rel="noopener noreferrer">https://labex.io/linuxjourney</a>.</p> <p>Our goal is straightforward: keep Linux Journey free, open source, and actively maintained for the next generation of Linux learners.</p> <p>We'll continue maintaining existing lessons, fixing issues, improving translations, and adding new beginner-friendly content over time.</p> <p>The official repository is now maintained by the LabEx team:</p> <p><a href="https://github.com/labex-labs/linuxjourney" rel="noopener noreferrer">https://github.com/labex-labs/linuxjourney</a></p> <p>We've also recently launched the Linux Journey iOS app, making it easier to learn Linux on the go:</p> <p><a href="https://apps.apple.com/app/linux-journey/id6770861660" rel="noopener noreferrer">https://apps.apple.com/app/linux-journey/id6770861660</a></p> <p>Most importantly, nothing changes about what made Linux Journey special.</p> <p>It remains free. It remains open source. It remains community-driven.</p> <p>A huge thank you to Cindy Quach and all contributors who helped build Linux Journey into one of the most loved Linux learning resources on the internet.</p> <p>We're honored to continue the journey.</p> linux labex programming tutorial Labby Sun, 07 Jun 2026 17:27:55 +0000 https://dev.clauneck.workers.dev/labex/master-git-how-to-undo-commits-switch-branches-and-manage-tags-effectively-1pb0 https://dev.clauneck.workers.dev/labex/master-git-how-to-undo-commits-switch-branches-and-manage-tags-effectively-1pb0 <p>Every developer has been there: a messy commit history, confusion over branch switching, or the need to mark a release milestone. Git is the backbone of modern software development, but mastering it requires more than just memorizing commands. This learning path takes you through three practical scenarios that turn Git from a daunting tool into your most reliable project assistant.</p> <h2> How to Undo and Remove a Specific Git Commit from Current Branch </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fgit-how-to-undo-and-remove-a-specific-git-commit-from-current-branch-392832" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fgit-how-to-undo-and-remove-a-specific-git-commit-from-current-branch-392832" alt="How to Undo and Remove a Specific Git Commit from Current Branch" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 15 minutes</p> <p>Learn how to undo and remove a specific Git commit from the current branch. Discover the best practices for managing Git commit history and restoring removed commits.</p> <p><a href="https://labex.io/labs/git-how-to-undo-and-remove-a-specific-git-commit-from-current-branch-392832" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/git-how-to-undo-and-remove-a-specific-git-commit-from-current-branch-392832" rel="noopener noreferrer">Tutorial →</a></p> <h2> Git Switch vs Git Checkout </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fgit-git-switch-vs-git-checkout-391555" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fgit-git-switch-vs-git-checkout-391555" alt="Git Switch vs Git Checkout" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 30 minutes</p> <p>Explore the differences between Git switch and Git checkout commands, learn when to use each, and master your Git workflow. Practical examples and use cases included.</p> <p><a href="https://labex.io/labs/git-git-switch-vs-git-checkout-391555" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/git-git-switch-vs-git-checkout-391555" rel="noopener noreferrer">Tutorial →</a></p> <h2> Tagging Your Project's History </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fgit-tagging-your-project-s-history-387763" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fgit-tagging-your-project-s-history-387763" alt="Tagging Your Project's History" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>Learn how to use Git tags to mark important milestones in your project's history. Practice creating lightweight and annotated tags, and listing tags in a repository using a time machine software project scenario.</p> <p><a href="https://labex.io/labs/git-tagging-your-project-s-history-387763" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/git-tagging-your-project-s-history-387763" rel="noopener noreferrer">Tutorial →</a></p> <p>Git mastery isn't about memorizing every flag in the manual; it is about understanding how to manage your project's evolution. By completing these three labs, you move from simply 'using' Git to 'commanding' it. Ready to level up your version control skills? Dive into these interactive exercises today and start building a cleaner, more professional development history.</p> git versioncontrol programming tutorial Labby Sat, 06 Jun 2026 17:24:35 +0000 https://dev.clauneck.workers.dev/labex/4-wireshark-labs-master-network-analysis-nmap-scanning-and-metasploit-exploitation-3gip https://dev.clauneck.workers.dev/labex/4-wireshark-labs-master-network-analysis-nmap-scanning-and-metasploit-exploitation-3gip <p>Ready to see what is really happening on your network? Wireshark is the gold standard for packet analysis, and we have built the perfect roadmap to take you from zero to hero. Forget boring videos—our hands-on labs put you in the driver's seat of a real network environment. Let's dive into the packets!</p> <h2> Use Nmap and Metasploit for Network Scanning and Vulnerability Analysis </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fnmap-use-nmap-and-metasploit-for-network-scanning-and-vulnerability-analysis-416120" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fnmap-use-nmap-and-metasploit-for-network-scanning-and-vulnerability-analysis-416120" alt="Use Nmap and Metasploit for Network Scanning and Vulnerability Analysis" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 25 minutes</p> <p>In this lab, you will learn how to use Nmap for network scanning and Metasploit for vulnerability analysis. You'll cover basic and advanced Nmap techniques, import scan results into Metasploit, and utilize Metasploit modules to identify and exploit vulnerabilities.</p> <p><a href="https://labex.io/labs/nmap-use-nmap-and-metasploit-for-network-scanning-and-vulnerability-analysis-416120" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/nmap-use-nmap-and-metasploit-for-network-scanning-and-vulnerability-analysis-416120" rel="noopener noreferrer">Tutorial →</a></p> <h2> Exploit Unreal IRCd Vulnerability with Nmap and Metasploit </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fnmap-exploit-unreal-ircd-vulnerability-with-nmap-and-metasploit-416126" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fnmap-exploit-unreal-ircd-vulnerability-with-nmap-and-metasploit-416126" alt="Exploit Unreal IRCd Vulnerability with Nmap and Metasploit" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 20 minutes</p> <p>In this lab, you will learn how to exploit the Unreal IRCd vulnerability using Nmap for vulnerability scanning and Metasploit for exploitation. You'll understand the vulnerability, scan for it, exploit it, and validate the successful exploitation. This hands-on lab provides practical experience in network security.</p> <p><a href="https://labex.io/labs/nmap-exploit-unreal-ircd-vulnerability-with-nmap-and-metasploit-416126" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/nmap-exploit-unreal-ircd-vulnerability-with-nmap-and-metasploit-416126" rel="noopener noreferrer">Tutorial →</a></p> <h2> Network Analysis with Wireshark </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fwireshark-network-analysis-with-wireshark-415958" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fwireshark-network-analysis-with-wireshark-415958" alt="Network Analysis with Wireshark" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 28 minutes</p> <p>In this lab, you will learn how to perform network analysis using Wireshark. You'll install Wireshark, capture network traffic, analyze packet data, and use filters to identify and investigate network issues. This hands-on experience will enhance your cybersecurity skills.</p> <p><a href="https://labex.io/labs/wireshark-network-analysis-with-wireshark-415958" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/wireshark-network-analysis-with-wireshark-415958" rel="noopener noreferrer">Tutorial →</a></p> <h2> Explore and Customize Wireshark Interface </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fwireshark-explore-and-customize-wireshark-interface-415949" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fwireshark-explore-and-customize-wireshark-interface-415949" alt="Explore and Customize Wireshark Interface" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 15 minutes</p> <p>In this lab, you will launch Wireshark and explore its interface. You'll learn how to navigate the various panels and customize the layout to suit your needs. This includes adjusting columns, filters, and display options for efficient network analysis.</p> <p><a href="https://labex.io/labs/wireshark-explore-and-customize-wireshark-interface-415949" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/wireshark-explore-and-customize-wireshark-interface-415949" rel="noopener noreferrer">Tutorial →</a></p> <p>Network analysis is a superpower in the cybersecurity world, and these labs are your fast track to gaining it. Whether you are troubleshooting a connection or hunting for intruders, these practical skills will serve you for years to come. Don't just read about it—jump into the playground and start capturing packets today!</p> wireshark cybersecurity networking tutorial Labby Fri, 05 Jun 2026 17:34:34 +0000 https://dev.clauneck.workers.dev/labex/master-java-core-5-hands-on-labs-for-oop-threading-and-encryption-44p8 https://dev.clauneck.workers.dev/labex/master-java-core-5-hands-on-labs-for-oop-threading-and-encryption-44p8 <p>Embarking on your Java journey can feel like staring at a mountain of syntax and abstract concepts. But what if you could master the language by building, breaking, and fixing real code? This curated learning path takes you from the basics of object-oriented design to the thrill of implementing your own encryption algorithms, all within an interactive environment designed for rapid skill acquisition.</p> <h2> Arranging Classes by Functionality </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-arranging-classes-by-functionality-178550" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-arranging-classes-by-functionality-178550" alt="Arranging Classes by Functionality" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this lab, you will learn to use packages to arrange for classes according to their functionalities.</p> <p><a href="https://labex.io/labs/java-arranging-classes-by-functionality-178550" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-arranging-classes-by-functionality-178550" rel="noopener noreferrer">Tutorial →</a></p> <h2> Overloading and Overriding </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-overloading-and-overriding-178549" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-overloading-and-overriding-178549" alt="Overloading and Overriding" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 10 minutes</p> <p>In this lab, you will learn method overloading and method overriding. Overriding and overloading are two concepts used in Java programming language. Both the concepts allow programmer to provide different implementations for methods under the same name. Overloading happens at compile-time while overriding happens at runtime. Static methods can be overloaded but cannot be overridden. Overloading is a static bond while overriding is dynamic bond.</p> <p><a href="https://labex.io/labs/java-overloading-and-overriding-178549" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-overloading-and-overriding-178549" rel="noopener noreferrer">Tutorial →</a></p> <h2> Implement Countdown Timer Thread </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-implement-countdown-timer-thread-179696" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-implement-countdown-timer-thread-179696" alt="Implement Countdown Timer Thread" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this challenge, we will be implementing a countdown timer. The objective is to create a child thread, handle time calculations using the Thread.sleep() method, and display the countdown effect based on the input number of seconds.</p> <p><a href="https://labex.io/labs/java-implement-countdown-timer-thread-179696" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-implement-countdown-timer-thread-179696" rel="noopener noreferrer">Tutorial →</a></p> <h2> Class and Object </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-class-and-object-178544" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-class-and-object-178544" alt="Class and Object" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this lab, you are going to learn a very important programming pattern: the object-oriented-programming. You need to know the difference between class and object. Take more practice to get a better understanding.</p> <p><a href="https://labex.io/labs/java-class-and-object-178544" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-class-and-object-178544" rel="noopener noreferrer">Tutorial →</a></p> <h2> Implement Encryption and Decryption </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-implement-encryption-and-decryption-179698" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-implement-encryption-and-decryption-179698" alt="Implement Encryption and Decryption" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this challenge, we will be implementing encryption and decryption operations based on a set of encryption rules. The encryption rules involve moving the ASCII code of each character in the plaintext forward by a certain length, reversing the result characters, and then moving the ASCII code backward by another length. Our task is to design a program that can perform these encryption and decryption operations based on the given rules. We have a code template provided, and we need to complete the code in the designated areas to meet the requirements of the challenge.</p> <p><a href="https://labex.io/labs/java-implement-encryption-and-decryption-179698" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-implement-encryption-and-decryption-179698" rel="noopener noreferrer">Tutorial →</a></p> <p>Java is more than just syntax; it is a way of structuring logic to solve complex problems. By completing these five labs, you have moved beyond simple 'Hello World' examples and into the realm of functional application development. Don't just read about code—start building it today and see how quickly your confidence grows.</p> java programming tutorial coding Labby Thu, 04 Jun 2026 17:50:43 +0000 https://dev.clauneck.workers.dev/labex/master-linux-command-line-custom-variables-user-auditing-and-file-redirection-45k0 https://dev.clauneck.workers.dev/labex/master-linux-command-line-custom-variables-user-auditing-and-file-redirection-45k0 <p>Stepping into the world of Linux can feel like entering a vast, uncharted territory. Whether you are a developer or an aspiring system administrator, the command line is your most powerful tool. At LabEx, we have curated a structured path that moves you from a curious beginner to a confident Linux user. Forget passive video tutorials; it is time to get your hands dirty in a real, interactive shell environment. Let’s walk through three foundational labs that will transform how you interact with your system.</p> <h2> Creating Custom Variables </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Flinux-creating-custom-variables-636067" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Flinux-creating-custom-variables-636067" alt="Creating Custom Variables" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 20 minutes</p> <p>In this lab, you will learn how to create, use, and export custom environment variables in Linux. You will understand the difference between local and environment variables and how to pass data to child processes.</p> <p><a href="https://labex.io/labs/linux-creating-custom-variables-636067" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/linux-creating-custom-variables-636067" rel="noopener noreferrer">Tutorial →</a></p> <h2> Users and Groups Explained </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fusers-and-groups-explained-636080" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fusers-and-groups-explained-636080" alt="Users and Groups Explained" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 20 minutes</p> <p>In this lab, you will learn how to audit system access entities by viewing and understanding user and group information on Linux systems using standard configuration files and commands.</p> <p><a href="https://labex.io/labs/users-and-groups-explained-636080" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/users-and-groups-explained-636080" rel="noopener noreferrer">Tutorial →</a></p> <h2> Redirection to Files </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fredirection-to-files-636021" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fredirection-to-files-636021" alt="Redirection to Files" width="1200" height="630"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 15 minutes</p> <p>In this lab, you will learn how to manage command output in Linux. You will practice redirecting standard output to files, appending data to existing files, and capturing error messages separately.</p> <p><a href="https://labex.io/labs/redirection-to-files-636021" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/redirection-to-files-636021" rel="noopener noreferrer">Tutorial →</a></p> <p>These three labs are more than just exercises; they are the building blocks of your Linux proficiency. By mastering variables, user management, and output redirection, you are laying the groundwork for advanced system administration and shell scripting. Ready to stop watching and start doing? Jump into the LabEx interactive playground today and start building your Linux expertise one command at a time.</p> linux shell sysadmin tutorial Labby Wed, 03 Jun 2026 18:26:07 +0000 https://dev.clauneck.workers.dev/labex/master-docker-command-quest-image-organization-and-container-execution-labs-40c8 https://dev.clauneck.workers.dev/labex/master-docker-command-quest-image-organization-and-container-execution-labs-40c8 <p>Docker has revolutionized how we build, ship, and run applications, but moving from theory to practice can be daunting. If you are looking to bridge the gap between understanding container concepts and executing them like a pro, this curated learning path is your perfect starting point. We have selected three hands-on labs that focus on the core mechanics of Docker, designed to get you comfortable with the command line and container lifecycle in under 30 minutes.</p> <h2> Docker Arena Command Quest </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fdocker-docker-arena-command-quest-271460" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fdocker-docker-arena-command-quest-271460" alt="Docker Arena Command Quest" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 10 minutes</p> <p>In this challenge, you'll master Docker command execution and container invocation. Test your skills in the Docker Arena and learn to effectively manage and interact with Docker containers through practical exercises.</p> <p><a href="https://labex.io/labs/docker-docker-arena-command-quest-271460" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/docker-docker-arena-command-quest-271460" rel="noopener noreferrer">Tutorial →</a></p> <h2> Superpower Image Organization in Docker </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fdocker-superpower-image-organization-in-docker-271462" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fdocker-superpower-image-organization-in-docker-271462" alt="Superpower Image Organization in Docker" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this challenge, you'll master Docker image organization. Learn to list, filter, and manage your Docker images effectively. Discover powerful techniques for tagging, removing, and optimizing your image library for streamlined development workflows.</p> <p><a href="https://labex.io/labs/docker-superpower-image-organization-in-docker-271462" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/docker-superpower-image-organization-in-docker-271462" rel="noopener noreferrer">Tutorial →</a></p> <h2> Docker Execute Command in Container </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fdocker-docker-execute-command-in-container-271461" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fdocker-docker-execute-command-in-container-271461" alt="Docker Execute Command in Container" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 10 minutes</p> <p>In this lab, you will learn how to execute commands inside a running Docker container. You'll explore the 'docker exec' command and its various options to interact with the container's shell and run specific tasks. This hands-on experience will enhance your Docker skills.</p> <p><a href="https://labex.io/labs/docker-docker-execute-command-in-container-271461" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/docker-docker-execute-command-in-container-271461" rel="noopener noreferrer">Tutorial →</a></p> <p>These three labs are more than just exercises; they are the building blocks of professional container orchestration. By practicing these commands in an interactive environment, you are gaining the real-world experience necessary to deploy applications with precision. Don't just read about Docker—start building today and see how these practical skills transform your development workflow.</p> docker devops containers tutorial Labby Tue, 02 Jun 2026 18:15:00 +0000 https://dev.clauneck.workers.dev/labex/cks-training-master-debugging-api-migration-and-volume-management-labs-3j4j https://dev.clauneck.workers.dev/labex/cks-training-master-debugging-api-migration-and-volume-management-labs-3j4j <p>Are you ready to tackle the Certified Kubernetes Security Specialist (CKS) exam? It is a challenging certification, but you do not have to do it alone. We have curated a hands-on learning path at LabEx designed to bridge the gap between theory and real-world security operations. Let’s dive into three foundational labs that will sharpen your cluster management and security skills immediately.</p> <h2> Use exec and Port Forwarding for Debugging </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fuse-exec-and-port-forwarding-for-debugging-663625" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fuse-exec-and-port-forwarding-for-debugging-663625" alt="Use exec and Port Forwarding for Debugging" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 40 minutes</p> <p>Deploy a small web application, inspect it with kubectl exec, and test it locally through kubectl port-forward.</p> <p><a href="https://labex.io/labs/use-exec-and-port-forwarding-for-debugging-663625" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/use-exec-and-port-forwarding-for-debugging-663625" rel="noopener noreferrer">Tutorial →</a></p> <h2> Update Deprecated API Manifests </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fupdate-deprecated-api-manifests-663623" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fupdate-deprecated-api-manifests-663623" alt="Update Deprecated API Manifests" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 45 minutes</p> <p>Practice recognizing a deprecated Kubernetes API manifest, finding the current API shape, and migrating an Ingress manifest to networking.k8s.io/v1.</p> <p><a href="https://labex.io/labs/update-deprecated-api-manifests-663623" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/update-deprecated-api-manifests-663623" rel="noopener noreferrer">Tutorial →</a></p> <h2> Use Ephemeral and Persistent Volumes in Pods </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fuse-ephemeral-and-persistent-volumes-in-pods-663624" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fuse-ephemeral-and-persistent-volumes-in-pods-663624" alt="Use Ephemeral and Persistent Volumes in Pods" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 35 minutes</p> <p>Use emptyDir for Pod-local temporary data, then use a PersistentVolumeClaim to keep data available after recreating a Pod.</p> <p><a href="https://labex.io/labs/use-ephemeral-and-persistent-volumes-in-pods-663624" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/use-ephemeral-and-persistent-volumes-in-pods-663624" rel="noopener noreferrer">Tutorial →</a></p> <p>These three labs are just the beginning of your CKS preparation. By mastering these practical tasks, you are building the muscle memory needed to pass the exam and excel in real-world cloud-native environments. Head over to the LabEx platform, start these labs today, and take a confident step toward your certification goals!</p> kubernetes cks devsecops cloud Labby Mon, 01 Jun 2026 18:51:59 +0000 https://dev.clauneck.workers.dev/labex/master-lfcs-training-3-hands-on-labs-for-process-and-job-management-5fb8 https://dev.clauneck.workers.dev/labex/master-lfcs-training-3-hands-on-labs-for-process-and-job-management-5fb8 <p>Ready to conquer the Linux Foundation Certified System Administrator (LFCS) exam? You are in the right place. Our structured LFCS training path is designed to turn theory into real-world mastery. Forget boring textbooks; we focus on hands-on practice that builds the muscle memory you need for the command line. Let's dive into three foundational labs that will sharpen your system administration game.</p> <h2> Set Up Scheduled Tasks </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Flinux-set-up-scheduled-tasks-47" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Flinux-set-up-scheduled-tasks-47" alt="Set Up Scheduled Tasks" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 30 minutes</p> <p>Learn how to set up and manage scheduled tasks on Linux using the watch command and crontab. You'll gain hands-on experience with automating recurring tasks and monitoring their execution.</p> <p><a href="https://labex.io/labs/linux-set-up-scheduled-tasks-47" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/linux-set-up-scheduled-tasks-47" rel="noopener noreferrer">Tutorial →</a></p> <h2> Linux Process Management </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Flinux-linux-process-management-46" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Flinux-linux-process-management-46" alt="Linux Process Management" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 25 minutes</p> <p>Learn to use essential Linux tools for managing processes and system resources, including ps, top, and free commands.</p> <p><a href="https://labex.io/labs/linux-linux-process-management-46" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/linux-linux-process-management-46" rel="noopener noreferrer">Tutorial →</a></p> <h2> Background Job Management </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Flinux-background-job-management-43" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Flinux-background-job-management-43" alt="Background Job Management" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 25 minutes</p> <p>Learn how to manage background jobs in Linux using the ampersand (&amp;) command, fg, jobs, and kill commands. Practice running commands in the background, monitoring job status, bringing jobs to the foreground, and terminating background processes.</p> <p><a href="https://labex.io/labs/linux-background-job-management-43" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/linux-background-job-management-43" rel="noopener noreferrer">Tutorial →</a></p> <p>These three labs are just the beginning of your journey toward LFCS certification. By mastering process control, automation, and job management, you are building a solid foundation for more complex tasks. Don't just read about Linux—get your hands dirty and start practicing today. Your path to becoming a certified system administrator starts with these practical steps!</p> lfcs linux automation tutorial Labby Sun, 31 May 2026 17:22:16 +0000 https://dev.clauneck.workers.dev/labex/5-css-flexbox-projects-from-responsive-dice-to-flexible-card-layouts-4gb6 https://dev.clauneck.workers.dev/labex/5-css-flexbox-projects-from-responsive-dice-to-flexible-card-layouts-4gb6 <p>CSS is the backbone of modern web aesthetics, but theory alone won't make you a developer. To truly master layout engines like Flexbox, you need to get your hands dirty. This curated LabEx learning path moves beyond dry documentation, offering five interactive, browser-based challenges designed to sharpen your CSS skills through real-world application.</p> <h2> Responsive Dice Layout with Flexbox </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-responsive-dice-layout-with-flexbox-300064" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-responsive-dice-layout-with-flexbox-300064" alt="Responsive Dice Layout with Flexbox" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 25 minutes</p> <p>In this project, you will learn how to create a responsive dice layout using Flexbox CSS. The goal is to arrange a set of dice with different patterns of dots, following specific layout requirements.</p> <p><a href="https://labex.io/labs/css-responsive-dice-layout-with-flexbox-300064" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/css-responsive-dice-layout-with-flexbox-300064" rel="noopener noreferrer">Tutorial →</a></p> <h2> Simple and Beautiful Home Page Design </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-simple-and-beautiful-home-page-design-300089" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-simple-and-beautiful-home-page-design-300089" alt="Simple and Beautiful Home Page Design" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this challenge, we will be working on designing a simple and beautiful homepage for LabEx's knowledge aggregation website. The goal is to complete the homepage layout according to the provided requirements, ensuring that the content is centered and the page has a width of 1024px.</p> <p><a href="https://labex.io/labs/css-simple-and-beautiful-home-page-design-300089" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/css-simple-and-beautiful-home-page-design-300089" rel="noopener noreferrer">Tutorial →</a></p> <h2> Give Your Page a Makeover </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-give-your-page-a-makeover-300083" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-give-your-page-a-makeover-300083" alt="Give Your Page a Makeover" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this challenge, we will be revamping the login page. Our goal is to complete the layout of the login page and make it visually appealing. We will be focusing on modifying the CSS file to achieve the desired style requirements such as form appearance, avatar image style, subtitle style, button style, and input box style.</p> <p><a href="https://labex.io/labs/css-give-your-page-a-makeover-300083" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/css-give-your-page-a-makeover-300083" rel="noopener noreferrer">Tutorial →</a></p> <h2> Fruit Arrangement with CSS Flexbox </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-fruit-arrangement-with-css-flexbox-300076" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-fruit-arrangement-with-css-flexbox-300076" alt="Fruit Arrangement with CSS Flexbox" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 10 minutes</p> <p>In this project, you will learn how to use CSS Flexbox to create a fruit arrangement layout. You will learn how to use the align-self and order properties to position and arrange the fruits in the bowls.</p> <p><a href="https://labex.io/labs/css-fruit-arrangement-with-css-flexbox-300076" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/css-fruit-arrangement-with-css-flexbox-300076" rel="noopener noreferrer">Tutorial →</a></p> <h2> Responsive Flexible Card Layout </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-responsive-flexible-card-layout-300067" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-responsive-flexible-card-layout-300067" alt="Responsive Flexible Card Layout" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 10 minutes</p> <p>In this project, you will learn how to create a flexible card layout using CSS Flexbox. The flexible card layout is a common design pattern used in web pages and applications, where content is displayed in a responsive and adaptable grid-like structure.</p> <p><a href="https://labex.io/labs/css-responsive-flexible-card-layout-300067" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/css-responsive-flexible-card-layout-300067" rel="noopener noreferrer">Tutorial →</a></p> <p>These five labs are more than just exercises; they are the building blocks of your front-end career. By moving from simple dice layouts to complex responsive grids, you will develop the muscle memory needed to tackle any design challenge. Stop reading about CSS and start building—jump into the LabEx playground today and see your code come to life.</p> css flexbox webdev tutorial Labby Sat, 30 May 2026 17:22:23 +0000 https://dev.clauneck.workers.dev/labex/master-mysql-views-and-window-functions-advanced-query-optimization-guide-563 https://dev.clauneck.workers.dev/labex/master-mysql-views-and-window-functions-advanced-query-optimization-guide-563 <p>Ready to take your database skills to the next level? Whether you are just starting out or looking to sharpen your query game, our MySQL learning path is built for you. Forget boring videos—we believe in learning by doing. Dive into our interactive environment and master the tools that make data management a breeze.</p> <h2> MySQL Views and Virtual Tables </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fmysql-mysql-views-and-virtual-tables-550920" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fmysql-mysql-views-and-virtual-tables-550920" alt="MySQL Views and Virtual Tables" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 20 minutes</p> <p>In this lab, you will learn how to work with MySQL views, which are virtual tables based on the result-set of an SQL statement. The lab covers creating, updating, querying, and dropping MySQL views. You'll create a database, populate it with data, and then create and manipulate a view.</p> <p><a href="https://labex.io/labs/mysql-mysql-views-and-virtual-tables-550920" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/mysql-mysql-views-and-virtual-tables-550920" rel="noopener noreferrer">Tutorial →</a></p> <h2> MySQL Window Functions </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fmysql-mysql-window-functions-550921" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fmysql-mysql-window-functions-550921" alt="MySQL Window Functions" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 20 minutes</p> <p>In this lab, we will explore the power of MySQL Window Functions. The goal is to learn how to perform calculations across sets of table rows that are related to the current row. We will use ROW_NUMBER(), SUM OVER, PARTITION BY, and LAG. This lab provides practical examples to understand and apply these window functions effectively.</p> <p><a href="https://labex.io/labs/mysql-mysql-window-functions-550921" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/mysql-mysql-window-functions-550921" rel="noopener noreferrer">Tutorial →</a></p> <p>Learning MySQL does not have to be a chore. With these practical labs, you will gain the confidence to handle real-world data challenges immediately. Stop reading about SQL and start writing it! Jump into the playground today and see how quickly you can master these essential database techniques.</p> mysql sql database tutorial Labby Fri, 29 May 2026 18:01:27 +0000 https://dev.clauneck.workers.dev/labex/master-html-and-css-build-dynamic-web-pages-with-ajax-and-advanced-styling-3c8 https://dev.clauneck.workers.dev/labex/master-html-and-css-build-dynamic-web-pages-with-ajax-and-advanced-styling-3c8 <p>Embarking on your web development journey can feel like staring at a blank canvas. While HTML provides the structure, the real magic happens when you bring that structure to life with style and interactivity. This curated learning path is designed to take you from a complete beginner to a confident developer, focusing on the practical, hands-on skills that matter most in today's fast-paced web environment.</p> <h2> Create AJAX Requests with XMLHttpRequest </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fhtml-create-ajax-requests-with-xmlhttprequest-451026" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fhtml-create-ajax-requests-with-xmlhttprequest-451026" alt="Create AJAX Requests with XMLHttpRequest" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 25 minutes</p> <p>Learn to implement AJAX requests using XMLHttpRequest, understand asynchronous communication, and handle server responses effectively in web development.</p> <p><a href="https://labex.io/labs/html-create-ajax-requests-with-xmlhttprequest-451026" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/html-create-ajax-requests-with-xmlhttprequest-451026" rel="noopener noreferrer">Tutorial →</a></p> <h2> Apply Basic CSS Selectors in Web Development </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-apply-basic-css-selectors-in-web-development-451022" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-apply-basic-css-selectors-in-web-development-451022" alt="Apply Basic CSS Selectors in Web Development" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 25 minutes</p> <p>Learn fundamental CSS selector techniques to style web elements efficiently, including tag, class, and ID selectors with practical examples and best practices.</p> <p><a href="https://labex.io/labs/css-apply-basic-css-selectors-in-web-development-451022" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/css-apply-basic-css-selectors-in-web-development-451022" rel="noopener noreferrer">Tutorial →</a></p> <h2> Apply Background Styles in CSS </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-apply-background-styles-in-css-451021" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fcss-apply-background-styles-in-css-451021" alt="Apply Background Styles in CSS" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 25 minutes</p> <p>Learn how to enhance web page design by applying various CSS background styles, including colors, images, positioning, and repetition techniques.</p> <p><a href="https://labex.io/labs/css-apply-background-styles-in-css-451021" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/css-apply-background-styles-in-css-451021" rel="noopener noreferrer">Tutorial →</a></p> <p>Web development is a craft best learned by doing. By moving through these three labs, you are not just reading about code—you are building the foundation of your future projects. Whether you are aiming to build a personal portfolio or launch a career in tech, these practical exercises provide the perfect starting point. Dive into the LabEx playground today and start turning your ideas into reality.</p> html css ajax webdev Labby Thu, 28 May 2026 18:00:58 +0000 https://dev.clauneck.workers.dev/labex/5-essential-java-coding-challenges-factorials-arrays-and-hashsets-explained-16bn https://dev.clauneck.workers.dev/labex/5-essential-java-coding-challenges-factorials-arrays-and-hashsets-explained-16bn <p>Java is a cornerstone of modern software development, powering everything from enterprise backends to Android applications. If you are just starting your journey, the best way to move from theory to practice is through hands-on coding. Our curated Java learning path offers a structured roadmap to master object-oriented programming and core syntax. In this article, we highlight five essential, bite-sized labs designed to help you build confidence and sharpen your problem-solving skills in just minutes.</p> <h2> Calculate the Factorial of a Number </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-calculate-the-factorial-of-a-number-110017" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-calculate-the-factorial-of-a-number-110017" alt="Calculate the Factorial of a Number" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this lab, you need to create a program that calculates the factorial of a given number by multiplying all the numbers from 1 to the given number.</p> <p><a href="https://labex.io/labs/java-calculate-the-factorial-of-a-number-110017" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-calculate-the-factorial-of-a-number-110017" rel="noopener noreferrer">Tutorial →</a></p> <h2> Determine Factors of a Number </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-determine-factors-of-a-number-110014" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-determine-factors-of-a-number-110014" alt="Determine Factors of a Number" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this lab, we will create a program that finds all the factors of a given number except the number itself.</p> <p><a href="https://labex.io/labs/java-determine-factors-of-a-number-110014" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-determine-factors-of-a-number-110014" rel="noopener noreferrer">Tutorial →</a></p> <h2> Determine Longer String From Inputs </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-determine-longer-string-from-inputs-110022" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-determine-longer-string-from-inputs-110022" alt="Determine Longer String From Inputs" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this lab, the task is to create a program that takes two string inputs from the user, determines the length of each string, compares the lengths, and prints the longer string.</p> <p><a href="https://labex.io/labs/java-determine-longer-string-from-inputs-110022" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-determine-longer-string-from-inputs-110022" rel="noopener noreferrer">Tutorial →</a></p> <h2> Find Differences Between Two Hashsets </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-find-differences-between-two-hashsets-110018" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-find-differences-between-two-hashsets-110018" alt="Find Differences Between Two Hashsets" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this lab, you need to create a program that finds the differences between two hashsets by removing the common elements using the removeAll() method and then printing the updated hashset.</p> <p><a href="https://labex.io/labs/java-find-differences-between-two-hashsets-110018" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-find-differences-between-two-hashsets-110018" rel="noopener noreferrer">Tutorial →</a></p> <h2> Print Even Numbers from Array </h2> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-print-even-numbers-from-array-110013" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fog-image.labex.io%2Flabs%2Fjava-print-even-numbers-from-array-110013" alt="Print Even Numbers from Array" width="800" height="400"></a></p> <p><strong>Difficulty:</strong> Beginner | <strong>Time:</strong> 5 minutes</p> <p>In this lab, you will create a program that takes user input for an integer array of size 10, iterates through each element using a for loop, and prints out only the even numbers from the array.</p> <p><a href="https://labex.io/labs/java-print-even-numbers-from-array-110013" rel="noopener noreferrer">Practice on LabEx →</a> | <a href="https://labex.io/tutorials/java-print-even-numbers-from-array-110013" rel="noopener noreferrer">Tutorial →</a></p> <p>These five labs are more than just exercises; they are the building blocks of your Java proficiency. By tackling these problems in our interactive playground, you gain the muscle memory needed to write clean, efficient code. Ready to level up your programming skills? Dive into these labs today and start building your foundation in Java.</p> java programming tutorial coding