Duo Unix includes a PAM module or alternatively a stand alone executable that can be used to protect programs such as SSH or Sudo. This repository is meant to be used for development or cutting edge ...

UNIX∗ is a general-purpose, multi-user, interactive operating system for the larger Digital Equipment Corporation PDP-11 and the Interdata 8/32 computers. It offers a number of features seldom found ...

xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix Version 6 (v6). xv6 loosely follows the structure and style of v6, but is implemented for a modern RISC-V multiprocessor using ...