The latest stable version of the Linux kernel is: 2.4.20 The latest prepatch for the stable Linux kernel tree is: 2.4.21-rc1 +The latest beta version of the Linux kernel is: 2.5.69 The latest 2.2 version of the Linux kernel is: 2.2.25 The latest 2.0 version of the Linux kernel is: 2.0.39 The latest prepatch for the 2.0 Linux kernel tree is: 2.0.40-rc6