The Linux 4.20 kernel series was released by Linus Torvalds on December 23rd, 2018, and it is currently the most advanced Linux kernel branch available to date. Linux kernel 4.20.1 is out now to mark the new series as “stable” instead of “mainline” on the kernel.org website, meaning that it’s ready for mass adoption by most Linux OS vendors, with Arch Linux being the first. And it looks like Linux kernel 4.20.1 is a major update to the Linux 4.20 kernel series, changing a total of 187 files, with 1790 insertions and 872 deletions. Therefore, we recommend installing it as soon as it’s available in the stable repositories of your favorite GNU/Linux distribution if you’re already using Linux kernel 4.20.