Sudo - Generally pronounced IPA: (sudu), is a program for Unix-like operating systems such as BSD, Mac OS X, and Linux that allows users to run programs with the security privileges of another user (normally the system's superuser) in a secure manner. By default it is installed in /usr/bin. sudo was originally written by Bob Coggeshall and Cliff Spencer around 1980 at the Department of Computer Science at SUNY/Buffalo. The current version is maintained by OpenBSD developer Todd C Miller and distributed under a BSD-style license.