CentOS7.9下安装完成docker后，我们开始部署第一个docker image-hello world

1.以root用户登录CentOS7.9服务器，拉取centos7 images

命令：

docker pull hello-world

[root@centos79 ~]# docker pull hello-world
Using default tag: latest
latest: Pulling from library/hello-world
2db29710123e: Pull complete 
Digest: sha256:2498fce14358aa50ead0cc6c19990fc6ff866ce72aeb5546e1d59caac3d0d60f
Status: Downloaded newer image for hello-world:latest
docker.io/library/hello-world:latest
[root@centos79 ~]# 

2.查看docker镜像

命令：

docker images | grep hello-world

[root@centos79 ~]# docker images | grep hello-world
hello-world                  latest     feb5d9fea6a5   2 years ago     13.3kB
[root@centos79 ~]# 

3.运行docker镜像hello-world

命令：

docker run hello-world

[root@centos79 ~]# docker run hello-world

Hello from Doc