Which of the following is NOT a role of the root user account?

The root user account, also known as the superuser, is a powerful account in Unix and Linux systems with the highest level of access and privileges. Its primary roles include managing system settings, configuring the network, bypassing file permission restrictions, and performing system maintenance tasks.

Running applications with limited file access, on the other hand, is not a role associated with the root account. The root user typically has unrestricted access to all files and system settings, which means they can modify, delete, or access any file in the system without limitations. This capability is contrary to the principle of executing applications with limited file access, which is generally reserved for regular user accounts to enhance security and prevent accidental or malicious changes to critical system files.

Therefore, while the root user can access network ports and manage system configurations, the idea of running applications with limited file access pertains to the use of regular user accounts designed to restrict excessive permissions for security reasons.