# kubeadm config print init-defaults > kubeadm-config.yaml
...

# kubeadm init --config=kubeadm-config.yaml --upload-certs
...

# 首先，需要安装 bash-complete 包，因为 kubectl 依赖于它。
apt-get install bash-completion # Debian
yum install bash-completion     # CentOS

# 然后，启用 kubectl 补全
echo "source <($(which kubeadm) completion bash)" >> ~/.bashrc
source ~/.bashrc