Measure the test taker's knowledge about the security and functions of the UbuntuLinux operating system.

The security and functionality of the Ubuntu system depend heavily on how to assign permissions to users and how to use them. It may be more important to understand how the UbuntuGNU/Linux environment processes users than to analyze the complicated details. First, when you install Ubuntu, you will be asked to create a user account. This initial user account will store related user files in the home file directory, this applies to the users created next. However, for the first user account you created

The security and functionality of the Ubuntu system depend heavily on how to assign permissions to users and how to use them. It may be more important to understand how the Ubuntu GNU/Linux environment processes users than to analyze the complicated details.

First, when you install Ubuntu, you will be asked to create a user account. This initial user account will store related user files in the home file directory, this applies to the users created next, but there are some special things for the first user account you created.

Take me as an example. When I installed Ubuntu, I created a "mark" user account. This mark is not only my first Ubuntu user, but also automatically assigned special and very powerful permissions that are not available to other users. My mark account can create users, change files and file directories, and complete some administrator functions on Ubuntu, these functions are usually completed with another important user account "root.

Therefore, in Ubuntu, you should understand the following three key users:

◆ The initial user created when Ubuntu is installed. Its name is mark

◆ Root users, usually with the highest permissions, are also considered as administrators

◆ All other users, I mean the basic users who are added after installation.

The three types of users mentioned above have their own folders, their own special permissions, and, most importantly, their specific roles in your Ubuntu system. In the following section, I will explain how to activate and use them. Let's start with basic users.

Note: Now, I assume that you log on to Ubuntu as an initial user, because only in this way can you have the permissions required to perform the following tasks.