命令：
base=https://github.com/docker/machine/releases/download/v0.14.0 && curl -L $base/docker-machine-$(uname -s)-$(uname -m) >/tmp/docker-machine && sudo install /tmp/docker-machine /usr/local/bin/docker-machine
官网地址：https://docs.docker.com/machine/install-machine/#install-machine-directly
查看版本
# ll /usr/local/bin/docker-machine -rwxr-xr-x 1 root root 28034848 6月 26 12:07 /usr/local/bin/docker-machine # docker-machine -version docker-machine version 0.14.0, build 89b8332