The chage command in Linux is used to enforce password policies and aging. It allows system administrators to set password expiration, minimum and maximum password age, and other security-related settings for user accounts. This helps enhance the security of the system by ensuring that passwords are regularly updated.

The "dependency resolution" process in a package manager is significant because it ensures that all required libraries and packages are installed to support a software package. It helps in managing complex software dependencies and makes sure that a package can function properly without missing components.

Kernel modules in Linux extend the functionality of the Linux kernel. They allow you to add or remove functionality from the kernel without the need to reboot the system. Kernel modules are a key mechanism for adding device drivers, file systems, and other essential functionalities to the kernel.

The if statement in Bash allows for decision-making. It enables you to execute different blocks of code based on whether a specified condition is true or false. You can use if, elif, and else to handle multiple conditions.

To ensure a consistent policy across machines, SELinux policies can be stored in Text format. The SELinux policy language is human-readable and editable in text format, making it easier to understand and manage security policies.

SELinux operates under two primary modes: Enforcing and Permissive. In Enforcing mode, SELinux actively enforces security policies and denies any actions that violate these policies. In Permissive mode, SELinux logs policy violations but doesn't actively deny them, making it a useful mode for policy debugging.

The file that defines the default settings when a new user account is created in Linux is /etc/login.defs. This file contains various parameters and settings related to user account creation, password policies, and more. Modifying this file can affect the behavior of the useradd and adduser commands.

During the Linux boot process, systemd initializes system settings. Systemd is a modern init system and service manager that has become the standard in many Linux distributions. It manages the startup and control of system services and settings, replacing the older init system.

In Linux, the hashed password information for users is stored in the /etc/shadow file. This file contains encrypted password hashes and other security-related information, such as password expiration dates, for user accounts. It is essential for protecting user credentials.

The service responsible for resolving domain names to IP addresses in Linux is the DNS (Domain Name System). DNS servers maintain a database of domain name-to-IP address mappings and help in translating human-readable domain names to numeric IP addresses, enabling network communication.