docker search 详解

docker search 用于从 Docker Hub（https://hub.docker.com）中搜索指定的镜像，用法如下：

[root@localhost ~]$ docker search centos
NAME                               DESCRIPTION                                     STARS    OFFICIAL    AUTOMATED
centos                             The official build of CentOS.                   5071     [OK]                
ansible/centos7-ansible            Ansible on Centos7                              119                  [OK]
jdeathe/centos-ssh                 CentOS-6 6.10 x86_64 / CentOS-7 7.5.1804 x86…   104                  [OK]
consol/centos-xfce-vnc             Centos container with "headless" VNC session…   73                   [OK]        

NAME           # 镜像仓库
DESCRIPTION    # 镜像描述信息
STARS          # 镜像收藏数
OFFICIAL       # 是否为docker官方发布的镜像
AUTOMATED      # 是否为自动化构建的镜像，关于自动化构建，可以查看官方文档：https://docs.docker.com/docker-hub/builds/#how-automated-builds-work