Linux is an open-source kernel and usually comes bundled with free and open-source software; however, proprietary software for Linux (software that isn't free and open-source) does exist and is available to end-users.
Linux is an open-source kernel and usually comes bundled with free and open-source software; however, proprietary software for Linux (software that isn't free and open-source) does exist and is available to end-users. (en)