Configure kernel on Ubuntu

1. install necessary complier and libraries.

# libncurses5-dev is developer's libraries and doc for ncurses
sudo apt-get install build-essential libncurses5-dev

2. download source linux-x.y.z.tar.bz2 from http://www.kernel.org
3. extract it then enter the directory and type

# console-based color menu
make menuconfig
# X-based GUI
make xconfig