This presentation introduces an online platform designed to simplify student training environments through sharing custom-built virtual machines running Linux. By leveraging Proxmox for VM management, LTSP for network booting, LDAP for unified authentication and VM-to-user mapping, and Apache Guacamole for VNC access via web browsers, this platform addresses the inconsistencies in operating systems and software installations on students' personal machines, providing a ready-to-use, course-specific OS.