}}</ref> যেটি চেক করে এখনও কার্নেল সোর্স ফাইল, প্যাচ বা কম্প্রেসড সোর্স ফাইলে এমন কোন সফটওয়্যার রয়েছে কি না যা মালিকানাধীন হতে পারে।
===পার্শ্বপ্রতিক্রিয়া===
The downside of removing proprietary firmware from the kernel is that it will cause loss of functionality of certain hardware that does not have a free software replacement available. This affects certain [[sound card|sound]], [[video card|video]], [[TV tuner card|TV tuner]], and [[Network interface controller|network]] (especially wireless) cards, as well as some other devices. When possible, free software replacement firmware is provided as a substitute,<ref>{{cite web|url=https://libreplanet.org/wiki/LinuxLibre:Devices_that_require_non-free_firmware |title=LinuxLibre:Devices that require non-free firmware |publisher=LibrePlanet |date=February 5, 2011 |accessdate=April 17, 2012}}</ref> such as the openfwwf<ref>{{cite web|url=https://www.ing.unibs.it/~openfwwf/|title=OpenFWWF - Open FirmWare for WiFi networks|work=unibs.it}}</ref> for b43, carl9170<ref>{{cite web|url=https://wireless.wiki.kernel.org/en/users/drivers/carl9170|title=en:users:drivers:carl9170 [Linux Wireless]|work=kernel.org}}</ref> and ath9k_htc<ref>{{cite web|url=https://wireless.wiki.kernel.org/en/users/drivers/ath9k_htc|title=en:users:drivers:ath9k_htc [Linux Wireless]|work=kernel.org}}</ref> [[wireless card driver]]s.
