The latest stable version of the Linux kernel is: 2.4.19 +The latest prepatch for the stable Linux kernel tree is: 2.4.20-pre2 The latest beta version of the Linux kernel is: 2.5.31 The latest prepatch for the beta Linux kernel tree is: 2.5.8-pre3 The latest 2.2 version of the Linux kernel is: 2.2.21