On July 1, 2019, the release of GNU Rush 2.0 was announced.
GNU Rush is a Restricted User Shell designed to provide stripped-down, non-interactive access to remote resources via ssh (like GNU Savannah). Flexible configuration gives system administrators full control over the features that are available to users, as well as control over the use of system resources such as virtual memory, processor time, etc.
This release completely rewrites the configuration processing code. The changes introduce a new configuration file syntax that provides a large set of control structures and translation instructions for handling arbitrary requests.
Source: linux.org.ru