Build qemu libvirt and virt-manager

Setup an enviroment for qemu/kvm with libvirt and virt-manager.

Git proxy setup

Set up git proxy, so could use git clone under proxy enviroment

Linux nvidia driver management

Solve the problem that reinstall driver when switching kernel.

Cross-compile arm64 linux kernel

This article is about steps to cross-compile arm64 linux kernel, and common error when you building. You could build it in X86-64 OS or direct under aarch64 OS.

Clock skew detected. Your build may be incomplete