Ubuntu is a popular Linux-based operating system that is open source and free of cost. It has a strong focus on usability and easy installation. Ubuntu is developed by Canonical Ltd. under the Debian project and is sponsored by South African entrepreneur Mark Shuttleworth. It requires less hardware resources and maintains performance well even with extensive use. Ubuntu comes in various distributions suitable for different devices and uses and offers thousands of free and open source software options. It is more secure than other operating systems and receives immediate updates.