将showdoc容器下的/var/www 拷贝到主机 /home/bonker/showdocTsp1.214下
docker cp showdoc:/var/www /home/bonker/showdocTsp1.214
将容器9e877 导出 /home/bonker/showdoc1.214.tar
docker export 9e877 > /home/bonker/showdoc1.214.tar
进入容器87f2c41d0cff 的bash
docker exec -it 87f2c41d0cff /bin/bash