rush

Restricted User SHell, providing limited remote access to resources

GNU Rush is a Restricted User Shell, designed for sites providing limited remote access to their resources, such as, for example, savannah.gnu.org. Its main program, rush, is configured as a user login shell for users that are allowed only remote access to the machine. Using a flexible configuration file, GNU Rush gives administrator complete control over the command lines that users execute, and allows to tune the usage of system resources, such as virtual memory, CPU time, etc. on a per-user basis.