Handbook atualizado

Installing the sources
The core around which all distributions are built is the Linux kernel. It is the layer between the user programs and the system hardware. Gentoo provides its users several possible kernel sources. A full listing with description is available at the Kernel overview page.

For amd64-based systems Gentoo recommends the sys-kernel/ package.

Choose an appropriate kernel source and install it using emerge:

root # emerge --ask sys-kernel/