启动 kubectl 自动补全功能

https://v1-29.docs.kubernetes.io/zh-cn/docs/tasks/tools/install-kubectl-linux/

#安装 bash-completion
apt-get install bash-completion 
或 
yum install bash-completion

source /usr/share/bash-completion/bash_completion

echo 'source <(kubectl completion bash)' >>~/.bashrc

helm