Implementation of Linux centralized user authentication and cloud storage in teaching

As Linux operating system gets more involved in computer teaching environment, centralizing student account and their data are important for teaching control. FreeBSD operating system as server, Ubuntu Linux as desktop client, centralized authentication and cloud data storage with NIS and NFS services for Linux users. Student user can login to Linux desktop from any Linux client, and access their data in cloud storage. This makes the teaching environment more efficient, more secure and more consistent.