I have a Gumstix Overo Earth and a Summit-Expansionboard. I want to create a 3G-Stick an Internet connection and connect an i2c temperature sensor. I need to recompile the kernel.

Is there a good tutorial or howto for compiling the linux-kernel? I would like to compile the kernel on Ubuntu systems. First i need the ppp-module in the kernel so i can use pppd.