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)

Creating, modifying, or deleting local user accounts

There are multiple commands that can be used to manage local user accounts in CentOS 7. This section covers only the most popular commands available in CentOS 7 to manage local user accounts.

Creating a user with the useradd command

The useradd command, when run without options, creates a user account with default parameters. The default parameters are read from the /etc/login.defs file and include parameters such as valid UID, GID number, default password aging rules, and so on. Values from this file are used while creating a new user only. The syntax of useradd is as follows:

$ useradd    <username>

useradd --help will display options that can be used with the useradd...