Sudo (su "do") is an open source and free command-line software that lets regular users to execute various commands that need root privileges or as a system administrator, under any GNU/Linux and UNIX-like operating systems.
The one tool for powerful system administration
However, not all users have access to the sudo command in a Linux environment, but only certain users or groups of users have this ability, as configured by the system administrator. They are called users with root privileges.
All the commands, as well as their arguments, run (as root) by a regular user are logged by default in the default logs directory of the respective Linux operating system. All Linux distributions include the sudo command by default.
Getting started with Sudo
Be default, Sudo is installed on any GNU/Linux operating system that is distributed either as ISO images (live or installable-only) or USB images. Sudo is also an essential package for distributions of Linux that need to be build from sources or by using pre-built binaries, such as Gentoo and Arch Linux respectively.
On Softpedia, you can download the latest version of Sudo as a universal sources archive in the tar.gz file format, which can be optimized for your computer platform, supporting both 32-bit and 64-bit instruction set architectures.
To install it, download the file and save it on your path, extract the archive, open a terminal emulator, navigate to the location of extracted archive files using the ‘cd’ command, and run the ‘./configure && make’ command to configure and compile the program.
After a successful installation, you can execute the ‘make install’ command with sudo (yes, sudo must be installed on your system prior to installation) or as root (system administrator), which is the recommended choice if sudo is not installed on your GNU/Linux system.