Sudo (su "do") allows a system administrator to give certain users (or groups of users) the ability to run some (or all) commands as root while logging all commands and arguments. Sudo operates on a per-command basis, it is not a replacement for the shell.
License: BSD License (revised)
Changes:
This release includes a rewritten parser that eliminates ordering issues that affected previous versions. The new parser also supports an #include facility. A new flag, -g, allows the user to specify a group/gid to run the command as, and the -l (list) option can now be used by root to list other users' permissions. This release also adds support for /etc/nsswitch.conf, which allows vendors to ship an LDAP-enabled sudo without having LDAP on by default.
More...