Book Image

CentOS Quick Start Guide

By : Shiwang Kalkhanda
Book Image

CentOS Quick Start Guide

By: Shiwang Kalkhanda

Overview of this book

Linux kernel development has been the worlds largest collaborative project to date. With this practical guide, you will learn Linux through one of its most popular and stable distributions. This book will introduce you to essential Linux skills using CentOS 7. It describes how a Linux system is organized, and will introduce you to key command-line concepts you can practice on your own. It will guide you in performing basic system administration tasks and day-to-day operations in a Linux environment. You will learn core system administration skills for managing a system running CentOS 7 or a similar operating system, such as RHEL 7, Scientific Linux, and Oracle Linux. You will be able to perform installation, establish network connectivity and user and process management, modify file permissions, manage text files using the command line, and implement basic security administration after covering this book. By the end of this book, you will have a solid understanding of working with Linux using the command line.
Table of Contents (11 chapters)

Understanding system logging

Most application programs and the kernel write their event information in log files maintained at different locations. It helps in keeping track of activities that are taking place on the system and also forms an essential part of system auditing. Monitoring of log files helps in spotting any unusual activity in the system. Logging also helps in troubleshooting any application problems. By convention, Linux uses the /var/log/ directory for storing logs in the system.

Starting with CentOS 7, we have two logging services that exist in the system:

  • Rsyslog service
  • Systemd-journald service
System time service should be properly configured before configuring log services, as time is an important component of log files.

Working with rsyslog