1.获取镜像

docker search centos:7.8.2003
#默认是latest

2.查看镜像

docker images
docker images centos

3.删除镜像

docker pull hello-world
docker rmi hello-world
docker ps -a
#查看容器运行记录
docker rm 4834b16881b8
#如果有就先删除记录

docker rmi  $(docker images -aq)
#docker rmi  `docker images -aq`
#批量删除镜像
docker rm $(docker ps -aq)
#docker rm `docker ps -aq`
#批量删除容器

4.导出镜像

[root@localhost ~]# docker save centos > /opt/centos.tgz
[root@localhost ~]# cd /opt/
[root@localhost opt]# ls
centos.tgz  containerd
[root@localhost opt]#

5.导入镜像

[root@localhost opt]# docker load -i centos.tgz
74ddd0ec08fa: Loading layer [==================================================>]  238.6MB/238.6MB
Loaded image: centos:latest
[root@localhost opt]#

[root@localhost opt]# docker images
REPOSITORY   TAG       IMAGE ID       CREATED         SIZE
centos       latest    5d0da3dc9764   20 months ago   231MB
[root@localhost opt]# docker image inspect 5d0
#查看镜像信息