netstat is a command-line tool that displays network connections, routing tables, interface statistics, and more. The -a option shows all listening and non-listening sockets on the server. This can help check the open ports on a server and identify any unwanted or malicious connections. Reference: https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/netstat

Explanation
The access control methodology that can be described best as allowing a user the least access based on the jobs the user needs to perform is role-based access control (RBAC). RBAC is an access control method that assigns permissions to users based on their roles or functions within an organization. RBAC provides fine-grained and manageable access control by defining what actions each role can perform and what resources each role can access. RBAC follows the principle of least privilege, which means that users are only granted the minimum level of access required to perform their tasks. RBAC can reduce security risks, simplify administration, and enforce compliance policies.

Unexpected shutdowns. If the system is randomly shutting down or rebooting, the most likely cause is a heat problem.

The WinSCP tool is commonly used to transfer files between Linux and Windows systems.
WinSCP has an easy GUI and encrypts the contents of the file transfer.