kubernetes补全
yum install -y epel-release bash-completion
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc
或者
yum install -y epel-release bash-completion
cp /usr/share/bash-completion/completions/docker /etc/bash_completion.d/
systemctl enable --now docker