Final answer:
The statement is true; the superuser, or root user, has the highest level of permissions on a Unix or Linux-based system, allowing unrestricted access to all files and commands, thus being exempt from usual file access control constraints.
Step-by-step explanation:
The question asks whether it is true or false that the superuser is exempt from the usual file access control constraints and has systemwide access. The statement is true. The superuser, also known as the root user in Unix and Linux-based systems, has the highest level of access permissions and is indeed exempt from the normal file access controls that apply to other users. The superuser can read, write, and execute files and commands that are restricted to other users. This level of access is necessary for system administration tasks such as installing software, changing system configurations, managing user accounts, and performing security updates. However, because of this power, it's crucial that superuser access is used responsibly to prevent accidental system damage or security vulnerabilities.
A superuser is a user account with elevated privileges, often synonymous with an administrator or root. Superusers have unrestricted access to system resources and settings, allowing them to perform critical tasks, install software, and modify configurations. While essential for system management, superuser access requires caution, as it can potentially lead to security risks if misused. In Unix-like systems, the superuser is often referred to as "root."