Book Image

Ubuntu 20.04 Essentials

By : Neil Smyth
Book Image

Ubuntu 20.04 Essentials

By: Neil Smyth

Overview of this book

Ubuntu is undeniably one of the most highly regarded and widely used Debian-based Linux distributions available today. Thanks to its ease of use and reliability, Ubuntu has a loyal following of Linux users and an active community of developers. Ubuntu 20.04 Essentials is designed to take you through the installation, use, and administration of the Ubuntu 20.04 distribution in detail. For beginners, the book covers topics such as operating system installation, the basics of the GNOME desktop environment, configuring email and web servers, and installing packages and system updates. Additional installation topics such as dual booting with Microsoft Windows are also covered along with crucial security topics such as configuring a firewall and user and group administration. For the experienced user, the book delves into topics such as remote desktop access, the Cockpit web interface, logical volume management (LVM), disk partitioning, and swap management. Further, it also explores KVM virtualization, Secure Shell (SSH), Linux containers, and file sharing using both Samba and NFS to provide a thorough overview of this enterprise-class operating system.
Table of Contents (38 chapters)
38
Index

12.2 Managing Repositories with Software & Updates

As an alternative to using the command-line, repositories may be configured from within the GNOME desktop environment using the Software & Updates app. To launch this app, press the special key on the keyboard (on Windows keyboards this is the Windows key, on macOS the Command key and on Chromebooks the key displaying a magnifying glass) and enter Software & Updates into the search bar. In the results panel click on the corresponding icon to launch the app. Alternatively, open a terminal window and run the following command:

$ update-manager

When the app loads, click on the Settings button as shown in Figure 12-1:

Figure 12-1

From the settings screen, enable or disable the required repositories listed under the Downloadable from the Internet heading:

Figure 12-2

To enable partner repositories, select the Other Software tab as shown in Figure 12-3:

Figure 12-3

To add other third-party...