第一部分：安装

1.查看系统版本：cat /etc/redhat-release

2.安装：yum install docker

3.检查是否成功：docker version

4.启动docker：

systemctl start docker.service
systemctl enable docker.service

5.查看docker信息：docker info

第二部分：使用

1.检索名字为tutorial的镜像：docker search tutorial

2.下载镜像：docker install learn/tutorial

3.查看下载的镜像：docker images

4.在docker中运行hello world：docker run learn/tutorial echo "hello world"
说明：*docker run命令有两个参数，一个是镜像名，一个是要在镜像中运行的命令 *

5.在docker中安装wget命令：docker run learn/tutorial apt-get install -y wget

6.查看容器Id：docker ps -l

[root@host-10-10-10-12 ~]# docker ps -l 
CONTAINER ID        IMAGE               COMMAND                  CREATED              STATUS                      PORTS               NAMES
1ced4f9a977b        learn/tutorial      "apt-get install -y w"   About a minute ago   Exited (0) 58 seconds ago                       tender_murdock

7.保存对容器的修改并命名为learn/wget：docker commit 1ced4f9a977b learn/wget

[root@host-10-10-10-12 ~]# docker ps -l 
CONTAINER ID        IMAGE               COMMAND                  CREATED              STATUS                      PORTS               NAMES
1ced4f9a977b        learn/tutorial      "apt-get install -y w"   About a minute ago   Exited (0) 58 seconds ago                       tender_murdock

8.检查运行中的镜像：docker inspect a7953f439817