Book Image

Linux for System Administrators

By : Viorel Rudareanu, Daniil Baturin
Book Image

Linux for System Administrators

By: Viorel Rudareanu, Daniil Baturin

Overview of this book

Linux system administration is an essential aspect of maintaining and managing Linux servers within an organization. The role of a Linux system administrator is pivotal in ensuring the smooth functioning and security of these servers, making it a critical job function for any company that relies on Linux infrastructure. This book is a comprehensive guide designed to help you build a solid foundation in Linux system administration. It takes you from the fundamentals of Linux to more advanced topics, encompassing key areas such as Linux system installation, managing user accounts and filesystems, networking fundamentals, and Linux security techniques. Additionally, the book delves into the automation of applications and infrastructure using Chef, enabling you to streamline and optimize your operations. For both newcomers getting started with Linux and professionals looking to enhance their skills, this book is an invaluable hands-on guide with a structured approach and concise explanations that make it an effective resource for quickly acquiring and reinforcing Linux system administration skills. With the help of this Linux book, you’ll be able to navigate the world of Linux administration confidently to meet the demands of your role.
Table of Contents (21 chapters)
Part 1: Linux Basics
Part 2: Configuring and Modifying Linux Systems
Part 3: Linux as a Part of a Larger System

Mounting and unmounting filesystems

In order for the computer to access files, the filesystem must be mounted. The mount command will show you what is mounted (usable) on your system at the moment.

I created my own /data folder and mounted a new HDD into it:

Figure 3.4 – A command showing what filesystem is mounted on /data

Figure 3.4 – A command showing what filesystem is mounted on /data

To mount your filesystem with a command, just run the following:

mount -t ext4 /dev/mapper/cs-home /data

In order to have it automatically mounted on reboot, you have to define this entry in /etc/fstab.

If you want to mount a CD-ROM, just run the following command:

mount -t iso9660 /dev/cdrom /mnt/cdrom

For more detailed information, consult the mount man page or run mount with the -h flag to get assistance.

The cd command can be used to traverse the newly accessible filesystem through the mount point you just created after mounting.

How to unmount the filesystem

Using the umount command and specifying...