OpenSSH

Linux Project: OpenSSH

License: BSD

Dates Active: 1999–present

Maintainers/Developers: OpenBSD project

Compatible Distro(s): All major Linux distros and Unix-like systems

History:

SSH (Secure Shell) replaced insecure remote shell tools like Telnet and rlogin. OpenSSH is the most widely used implementation, developed as part of the OpenBSD project to ensure secure communications.