The latest stable version of the Linux kernel is: 2.4.17 +The latest prepatch for the stable Linux kernel tree is: 2.4.18-rc4 The latest beta version of the Linux kernel is: 2.5.5 The latest prepatch for the beta Linux kernel tree is: 2.5.5-pre1 The latest 2.2 version of the Linux kernel is: 2.2.20