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)

Communicating with processes using signals

Processes communicate with each other using signals. We can also communicate with processes using kill, pkill, or the killall command to pass different signals.

Defining a signal and its types

A signal is a kind of software interrupt to a process. A signal can also be considered as a notification that needs to be processed for a specific event. Kill, pkill, and killall are programs that are used to deliver these signals to processes. On Linux, every signal name begins with the characters SIG. The signal numbers described in the following table may vary on different Linux hardware platforms, however, in any case, the signal name and meaning will remain the same.

The following table...