XRSH (Extended Restricted SHell) is a modern, minimalist restricted shell designed to provide a secure and lightweight environment for executing predefined commands. It aims to offer an enhanced alternative to traditional restricted shells by focusing on simplicity, security, and ease of configuration. XRSH allows administrators to tightly control user access to system commands, preventing unauthorized execution while enabling essential tasks to be performed safely. With its extensible design, XRSH is suitable for use cases such as embedded systems, containerized environments, and other scenarios requiring robust command restrictions without sacrificing usability.
Developed as an open-source project, XRSH features straightforward configuration through simple syntax and supports command whitelisting, environment sanitation, and resource limitation. Its architecture ensures minimal overhead and fast startup times, making it ideal for environments where performance and security are critical. By utilizing XRSH, system administrators can effectively create confined user sessions that enhance system security while maintaining necessary operational capabilities.