Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Security Features of Ubuntu Server Operating System A.S. GRUSHITSYN, V.A. BULANOV, T.A. BULANOVA The article discusses the key aspects of security for the server operating system Ubuntu Server. It describes the main protection measures including regular updates, kernel and system protection, user and access control management, network security, data encryption, container security, monitoring and auditing, attack protection, cloud security, and standards compliance. The tools for security analysis are also discussed as well as recommendations for setting up security. The drawbacks of Ubuntu Server such as support duration, documentation quality, performance, hardware compatibility, dependency management, open-source code security, and enterprise-level support are examined. Keywords: Security, data protection, monitoring, security analysis tools, security setup recommendations, Ubuntu Server. DOI: 10.25791/pribor.4.2025.1576 Pp. 36-44.