Answer: An open source operating system
Linux is a free and open-source operating system. Let us understand the terms free and Open source.
Step-by-step explanation:
Free indicates that it can be downloaded without any cost and can use it either personally or for commercial but the user does not have rights to sell.
Open source indicates that the user can edit the code written for the operating system and use it personally or even once again circulate in the Linux website for free of cost. Open source means the code is available for free to the user.