Book Image

Fundamentals of Linux

By : Oliver Pelz
Book Image

Fundamentals of Linux

By: Oliver Pelz

Overview of this book

Linux is a Unix-like operating system assembled under the model of free and open source software development and distribution. Fundamentals of Linux will help you learn all the essentials of the Linux command line required to get you started. The book will start by teaching you how to work with virtualization software and install CentOS 7 Linux as a VM. Then, you will get to grips with the workings of various command line operations, such as cursor movement, commands, options, and arguments. As you make your way through the chapters, the book will not only focus on the most essential Linux commands but also give an introduction to Bash shell scripting. Finally, you will explore advanced topics, such as networking and troubleshooting your system, and you will get familiar with the advanced file permissions: ACL, setuid, and setgid. Fundamentals of Linux includes real-world tasks, use cases, and problems that, as a system administrator, you might encounter in your day-to-day activities.
Table of Contents (7 chapters)

Installing new software and updating the system

In this section, we will show you how you can install new software on your computer and how to update your CentOS 7 system.

First, let's show all the currently installed RPM packages on the system. Type yum list installed:

In the installation chapter in Chapter 1, Introduction to Linux, we already demonstrated how you can do a full system update using the yum command, which will update all of the RPM packages that are already included in the minimal installation, and also all the packages we have installed afterwards.

To get a list of all the updates currently available for all the software packages already installed on your system, type the following command to see what's new: yum check update:

Here, all the RPM software packages are listed with the new version of the updates you can install. All updates must be done...