A practical guide to troubleshooting the CentOS 7 community-based enterprise server About This Book Gain exposure to insider tips and techniques to quickly detect the reason for poor network/storage performance Troubleshooting methodologies, defining, and isolating problems Identify key issues that impact performance, storage, scalability, capacityWho This Book Is For It is assumed that you will already have a server up and running, you have a good working knowledge of CentOS, and you are comfortable with the concept of working with those services used by your server.What You Will Learn Consider the need to understand, manipulate, and make use of the relevant system log files Analyze, review, and make decisions regarding how and what to do with troublesome active processes on a CentOS server Discover how to approach issues regarding the network environment Approach issues regarding package management and learn how to make the necessary steps to diagnose and fix the problems found in relation to their YUM- and RPM-based needs Diagnose and troubleshoot issues related to Samba, NFS, and various external storage methods Diagnose and troubleshoot issues related to iptables, SELinux, some common firewalls, shell access, and SSH In Detail CentOS is the enterprise-grade Linux operating system built using the same source code as Red Hat Enterprise Linux (RHEL) to provide a free-to-use alternative to Red Hat's commercial Linux offering. The purpose of this book is to build on your understanding of CentOS and to explore those mission-critical services you are entrusted to manage and maintain. Starting with a brief introduction to the overall subject of troubleshooting a CentOS server, this book will take you on a journey across the whole spectrum of issue-based problem solving, which includes active processes, the networking environment, package management, users, folders, files, shared resources, security, databases, and web-based services. By the end of the book, you will have expert-level competency in identifying and diagnosing the root causes of CentOS storage, network, and administration issues and resolving them.