A problem may manifest in many forms. It could be a suddenly unresponsive system to a total application crash. It could be a system running in degraded manner to a system which simply errors out on every flow. What are the effective means to troubleshoot Java application on Linux? While, the topic at hand is enormously vast, there exist a lot of useful Linux commands and tips which every developer must learn to effectively diagnose a problem quickly. This Knowledge Sharing article will discuss at length commands and tips which can help developers appreciate the science behind troubleshooting. It is not lack of knowledge that limits us but inability to apply the same knowledge effectively and correlate application behavior with operating system (OS) bookkeeping data. We will look at some interesting examples and use command outputs to indicate how root cause analysis could have been done immediately. This article discusses at length commands and tips which can help developers appreciate the science behind troubleshooting.
Effectively reading and understanding existing code is a developer’s superpower. In this book, you’ll master techniques for code profiling, advanced debugging, and log evaluation to find and fix bugs and performance problems. Troubleshooting Java: Read, debug, and optimize JVM applications teaches you how to better understand Java application code. It’s filled with code investigation techniques for tricky issues like uncovering glitches in code logic or locating intermittent runtime problems. Armed with the tools and practices in this invaluable guide, you’ll save time whenever you need to identify performance issues, understand dependencies, discover the root cause of crashes, or interpret unexpected results. Whether you’re a senior software engineer or you’re just getting started, Troubleshooting Java: Read, debug, and optimize JVM applications will help you in the fundamental task of understanding how your applications work. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications.
This detailed how-to book on using Java on a Linux operating system covers installing and enabling a Java runtime environment under Linux, Java development in Linux, running Java applications and applets, using Java with Linux-based Web servers, using Sun Components JCE and JAI in Linux, and more. The book points the way to a Web site with all the code from the book.
“If you’re a developer trying to figure out why your application is not responding at 3 am, you need this book! This is now my go-to book when diagnosing production issues. It has saved me hours in troubleshooting complicated operations problems.” –Trotter Cashion, cofounder, Mashion DevOps can help developers, QAs, and admins work together to solve Linux server problems far more rapidly, significantly improving IT performance, availability, and efficiency. To gain these benefits, however, team members need common troubleshooting skills and practices. In DevOps Troubleshooting: Linux Server Best Practices, award-winning Linux expert Kyle Rankin brings together all the standardized, repeatable techniques your team needs to stop finger-pointing, collaborate effectively, and quickly solve virtually any Linux server problem. Rankin walks you through using DevOps techniques to troubleshoot everything from boot failures and corrupt disks to lost email and downed websites. You’ll master indispensable skills for diagnosing high-load systems and network problems in production environments. Rankin shows how to Master DevOps’ approach to troubleshooting and proven Linux server problem-solving principles Diagnose slow servers and applications by identifying CPU, RAM, and Disk I/O bottlenecks Understand healthy boots, so you can identify failure points and fix them Solve full or corrupt disk issues that prevent disk writes Track down the sources of network problems Troubleshoot DNS, email, and other network services Isolate and diagnose Apache and Nginx Web server failures and slowdowns Solve problems with MySQL and Postgres database servers and queries Identify hardware failures–even notoriously elusive intermittent failures
Degunking Linux expertly shows readers how to save time (and money) by performing a number of important degunking tasks. With Degunking Linux's easy 12-step program, users will learn what Linux gunk is, how to keep their Linux desktop clean and organized, how to better manage personal and system-related files, how to make applications ran their best, how to get gunky and incompatible drivers and hardware to run smoothly, how to protect their precious data from dangerous viruses and hackers, how to clean up and improve Linux's security features, and much more. Linux users will learn the causes of sluggish performance and how to apply smart solutions to improve overall system performance.
Learn how to design, develop, and deploy real-world Java business applications on Linux--the fastest growing Java development platform. This book covers the full application development life cycle on Linux, from designing and developing an application to deploying and maintaining it.
Identify, capture and resolve common issues faced by Red Hat Enterprise Linux administrators using best practices and advanced troubleshooting techniques About This Book Develop a strong understanding of the base tools available within Red Hat Enterprise Linux (RHEL) and how to utilize these tools to troubleshoot and resolve real-world issues Gain hidden tips and techniques to help you quickly detect the reason for poor network/storage performance Troubleshoot your RHEL to isolate problems using this example-oriented guide full of real-world solutions Who This Book Is For If you have a basic knowledge of Linux from administration or consultant experience and wish to add to your Red Hat Enterprise Linux troubleshooting skills, then this book is ideal for you. The ability to navigate and use basic Linux commands is expected. What You Will Learn Identify issues that need rapid resolution against long term root cause analysis Discover commands for testing network connectivity such as telnet, netstat, ping, ip and curl Spot performance issues with commands such as top, ps, free, iostat, and vmstat Use tcpdump for traffic analysis Repair a degraded file system and rebuild a software raid Identify and troubleshoot hardware issues using dmesg Troubleshoot custom applications with strace and knowledge of Linux resource limitations In Detail Red Hat Enterprise Linux is an operating system that allows you to modernize your infrastructure, boost efficiency through virtualization, and finally prepare your data center for an open, hybrid cloud IT architecture. It provides the stability to take on today's challenges and the flexibility to adapt to tomorrow's demands. In this book, you begin with simple troubleshooting best practices and get an overview of the Linux commands used for troubleshooting. The book will cover the troubleshooting methods for web applications and services such as Apache and MySQL. Then, you will learn to identify system performance bottlenecks and troubleshoot network issues; all while learning about vital troubleshooting steps such as understanding the problem statement, establishing a hypothesis, and understanding trial, error, and documentation. Next, the book will show you how to capture and analyze network traffic, use advanced system troubleshooting tools such as strace, tcpdump & dmesg, and discover common issues with system defaults. Finally, the book will take you through a detailed root cause analysis of an unexpected reboot where you will learn to recover a downed system. Style and approach This is an easy-to-follow guide packed with examples of real-world core Linux concepts. All the topics are presented in detail while you're performing the actual troubleshooting steps.
You’ve bested creepers, traveled deep into caves, and maybe even gone to The End and back—but have you ever transformed a sword into a magic wand? Built a palace in the blink of an eye? Designed your own color-changing disco dance floor? In Learn to Program with Minecraft®, you’ll do all this and more with the power of Python, a free language used by millions of professional and first-time programmers! Begin with some short, simple Python lessons and then use your new skills to modify Minecraft to produce instant and totally awesome results. Learn how to customize Minecraft to make mini-games, duplicate entire buildings, and turn boring blocks into gold. You’ll also write programs that: –Take you on an automated teleportation tour around your Minecraft world –Build massive monuments, pyramids, forests, and more in a snap! –Make secret passageways that open when you activate a hidden switch –Create a spooky ghost town that vanishes and reappears elsewhere –Show exactly where to dig for rare blocks –Cast a spell so that a cascade of flowers (or dynamite if you’re daring!) follows your every move –Make mischief with dastardly lava traps and watery curses that cause huge floods Whether you’re a Minecraft megafan or a newbie, you’ll see Minecraft in a whole new light while learning the basics of programming. Sure, you could spend all day mining for precious resources or building your mansion by hand, but with the power of Python, those days are over! Requires: Windows 7 or later; OS X 10.10 or later; or a Raspberry Pi. Uses Python 3
