How to List Docker Images in Linux Ubuntu 19.10 Operating System

In this article, there will be just one main focus discussion. It is only discussing about how to list the docker images. Every docker container will use a docker images. For a more suitable answer, there is a further explanation in this link. In that link,  an instance of an image is called a container. You have an image, which is a set of layers as you describe. If you start this image, you have a running container of this image. You can have many running containers of the same image. As in another article, in order to see or to list all the available containers, just execute the command ‘ps -a’. The article exist in this link.  By default You can see all your images with docker images whereas you can see your running containers with docker ps (and you can see all containers with docker ps -a).

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How to Remove the Initialization Script for Managing Service in Linux Ubuntu 19.10 Operating System

Introduction

This is an article where the main content is to focus on discussing about how to remove the initialization script of a service. In any operating system, it will manage service running on it. Not to mention in this context article, the Linux Ubuntu 19.10 operating system. Basically, this article will have an opposite impact on the other article in this link. That link has a title of ‘How to Register Initialization Script for Managing Service in Linux Ubuntu 19.10 Operating System’. It will remove the symbolic link of an available service where it exist through the register process of the initialization script. In Ubuntu, according to the article exist in this link, there are three main init system in Linux Ubuntu operating system. Those main init system are :

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How to Register Initialization Script for Managing Service in Linux Ubuntu 19.10 Operating System

Introduction

This article will focus on how to register a service in an operating system. Actually, every type of operating system has lots of service running on it. TIn Ubuntu, according to the information in this link, there are three types of main init system. Those are the ‘Systemd’, ‘Upstart’ and ‘SysV’. According to that link, Upstart init system was available just before the ‘systemd’. It was available in Ubuntu 9.10 to Ubuntu 14.10. Later on, it was later phased out paving way for systemd init in Ubuntu 15.04 and newer versions. Upstart makes use of config files for controlling services. These files exist under the /etc/init directory. These files consist of plain text sections organized in stanzas and each stanza describes a service and how it works.

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How to Activate mod_rewrite Apache Webserver Module in Linux Ubuntu 19.10 Operating System

This article has a specific content for explaining about how to activate ‘mod_rewrite’ in Apache Webserver. One of the actual function having this module is to be able to recognize the ‘RewriteEngine’ line configuration in ‘.htaccess’ file. It is very important in order to modify the URL address of a web-based application running in Apache Webserver. Moreover, the behavior for the URL modification is actually exist in that file of ‘.htaccess’. So, the following is the actual content of the .htaccess for an example :

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