It’s been two weeks since the release of the Linux 5.3 kernel series, and the merge window for Linux kernel 5.4 is now officially closed, which means that the development cycle can start and weekly RC (Release Candidate) builds will be released to allow the community to test it and send feedback. The first Linux kernel 5.4 Release Candidate build is now available to download from kernel.org or through our free Linux software portal if you want to take it for test drive, but please be aware that this is an early development release that should not be installed on production machines.