A UNIX command that allows administrators to grant partial root privileges to other users.
Sudo, which stands for “superuser do,” allows administrators to grant selective privileges to users and groups for running different commands. When a user has been assigned privileges to “sudo” some command, the user simply types sudo followed by the command. Sudo then checks to see whether the user has suitable privileges for running the specified command, and if so, performs the command. Sudo also can be configured to prompt the user for a password for more security. Sudo is a useful command in enterprise environments in which delegating limited privileges to individuals can simplify the job of the administrator. By using Sudo to grant users the privilege of running only certain commands as root and not others, Sudo can create a more secure network environment than one in which root privileges are assigned indiscriminately. Sudo was developed by Todd Miller and is free software distributed under a Berkeley Software Distribution (BSD)–style license. Sudo is available for most versions of UNIX/Linux.