In this section, you gained insights into:

User Account Management:
Understanding the process of creating, modifying, and deleting user accounts on a Linux system.

User Accounts:
Exploring the concept of user accounts, which allow individuals to access and interact with the system.

Attributes of a User Account:
Examining the various attributes associated with a user account, including user ID, group ID, and home directory.

Creating User Accounts with useradd:
Learning how to create user accounts using the useradd command.

Modifying and Deleting User Accounts:
Understanding the procedures for modifying and deleting user accounts as needed.

Locked Accounts:
Exploring the concept of locked accounts, which restrict user access.

User IDs and /etc/passwd:
Understanding the role of user IDs and the /etc/passwd file in user account management.

Why Use /etc/shadow?:
Exploring the purpose of the /etc/shadow file, which stores encrypted password information.

More on /etc/shadow:
Understanding additional details stored in the /etc/shadow file, including password aging information.

Password Management:
Learning about password management practices, including changing passwords and enforcing password policies.

Password Aging (chage):
Exploring the use of the chage command to manage password aging and expiration.

Restricted Shell:
Understanding the concept of a restricted shell, which limits user access to specific commands.

Restricted Accounts:
Exploring the creation and management of restricted user accounts.

The Root Account:
Understanding the significance of the root account, which has superuser privileges.

SSH (Secure Shell):
Introduction to SSH, a secure protocol for remote access and communication.

SSH Configuration Files:
Exploring configuration files related to SSH, which allow customization of SSH behavior.

Remote Graphical Login:
Understanding the concept of remote graphical login, which allows users to access graphical interfaces on a remote system.