Fush

Fush is an innovative Unix shell replacement that offers advanced security features unavailable in any other shell. With Fush, a system administrator can monitor and record every command that has been entered, significantly enhancing the system's overall security. Fush also enables restriction of specific commands on a per-user basis, giving administrators maximum control over system usage.

Another remarkable feature of Fush is its ability to generate MD5 sums for commands on the system, further enhancing security. This feature can also enable the administrator to permit or prohibit any particular command, ensuring that only approved commands are run on the system. By providing ultimate flexibility and control to the system administrator, Fush proves to be a highly effective tool in enforcing security measures while providing a functional environment for the end-user.

Overall, Fush is an excellent choice for Unix shell users seeking a more secure and controlled environment for their system management. Its unique security features make it an indispensable tool for system administrators, and the benefits it brings to the end-user are equally significant.