centos安装docker-ce shell脚本

#!/bin/bash
yum -y install bc
kenel=`uname -r`
kenel=`echo ${kenel:0:3}`
if [  $(echo "${kenel} >= 3.10" | bc) = 1  ];then
   sudo yum install -y yum-utils
   sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
   sudo yum makecache fast
   sudo yum -y install docker-ce
   sudo systemctl start docker
   sudo systemctl enable docker
else
   echo "内核版本太低，请您升级内核版本"
fi