Linux is software that does not cost money and is available for unrestricted modification.
ogglnks -RSB- or , less frequently , -LSB- lanks -RSB- -RRB- is a Unix-like computer operating system assembled under the model of free and open-source software development and distribution .	Unix-like	Unix-like	open-source	open-source	operating system	operating system	free and open-source software	free and open-source software	software	software
That is , anyone is freely licensed to use , copy , study , and change the software in any way , and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software .	freely licensed	free software license	source code	source code
