The latest stable version of the Linux kernel is: 2.4.18 +The latest prepatch for the stable Linux kernel tree is: 2.4.19-pre3 The latest beta version of the Linux kernel is: 2.5.6 The latest prepatch for the beta Linux kernel tree is: 2.5.6-pre3 The latest 2.2 version of the Linux kernel is: 2.2.20