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This paper provides an in-depth exploration of technical solutions for configuring and running Ubuntu Graphical User Interface (GUI) environments within Docker containers. By analyzing the fundamental differences between Docker containers and virtual machines in GUI support, this article systematically introduces remote desktop solutions based on the VNC protocol, with a focus on the implementation principles and usage methods of the fcwu/docker-ubuntu-vnc-desktop project. The paper details how to launch Ubuntu containers with LXDE desktop environments using Docker commands and access GUI interfaces within containers through noVNC or TigerVNC clients. Additionally, this article discusses technical challenges encountered in containerized GUI applications, such as Chromium sandbox limitations and audio support issues, and provides corresponding solutions. Finally, the paper compares the advantages and disadvantages of running GUI applications in Docker containers versus traditional virtual machine approaches, offering comprehensive technical guidance for developers working with GUI application development and testing in containerized environments.