kubectl命令自动补全

yum install -y bash-completion

source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)

以上只是零时起作用，每次登录终端都得起效需要：
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)

加入到/root/.bashrc文件中。
即可以：

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

# echo "source <(helm completion bash)" >> ~/.bashrc
source ~/.bashrc

echo "source /usr/share/bash-completion/bash_completion">>/root/.bashrc
source /root/.bashrc

就可以愉快的使用自动补全啦~