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

31.4 Managing a Container

Once launched, a container will continue to run until it is stopped via podman, or the command that was launched when the container was run exits. Running the following command on the host, for example, will cause the container to exit:

$ podman stop mycontainer

Alternatively, pressing the Ctrl-D keyboard sequence within the last remaining bash shell of the container would cause both the shell and container to exit. Once it has exited, the status of the container will change accordingly:

$ podman ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

4b49ddeb2987 docker.io/library/ubuntu:latest /bin/bash 6 minutes ago Exited (127) About a minute ago mycontainer

Although the container is no longer running, it still exists and contains all of the changes that were made to the configuration and file system. If you installed packages, made configuration changes...