搜索docker镜像

docker search centos
NAME                           DESCRIPTION                                      STARS     OFFICIAL
centos                         DEPRECATED; The official build of CentOS.        7771      [OK]
centos/postgresql-10-centos7   PostgreSQL is an advanced Object-Relational …   21
corpusops/centos               centos corpusops baseimage                       0
centos/httpd-24-centos8                                                         3
centos/redis-5-centos8                                                          0
centos/postgresql-96-centos7   PostgreSQL is an advanced Object-Relational …   45
centos/postgresql-10-centos8                                                    0
centos/systemd                 systemd enabled base container.                  115
centos/mariadb-103-centos8                                                      2
centos/mysql-56-centos7        MySQL 5.6 SQL database server                    23
centos/postgresql-12-centos8                                                    0
centos/mariadb-102-centos7     MariaDB 10.2 SQL database server                 6
centos/mysql-80-centos8                                                         0


docker search centos --limit 5

搜索效果如下图所示，其提供了五个字段，分别代表的含义解释如下:
NAME:镜像的名称。
DESCRIPTION:镜像的描述信息。
STARS:镜像的星星数量，星星越多，说明受欢迎度越高哟~
OFFICIAL:该镜像是否是官方发布。
AUTOMATED:该镜像是否支持支持自动化构建功能。

下载镜像

docker pull centos
Using default tag: latest
latest: Pulling from library/centos
a1d0c7532777: Pull complete
Digest: sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177
Status: Downloaded newer image for centos:latest
docker.io/library/centos:latest

查看本地镜像列表

docker images
REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
centos       latest    5d0da3dc9764   3 years ago   231MB

导出镜像

docker save -o centos.tar.gz centos
##最好用镜像名字，不要用镜像id，因为用镜像id导出再导入的镜像没有版本，将会是none

删除镜像

docker rmi centos
Untagged: centos:latest
Untagged: centos@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177
Deleted: sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6
Deleted: sha256:74ddd0ec08fa43d09f32636ba91a0a3053b02cb4627c35051aff89f853606b59
-f：代表强制删除

导入镜像

docker load -i centos.tar.gz
74ddd0ec08fa: Loading layer [==================================================>]  238.6MB/238.6MB
Loaded image: centos:latest

打标签

docker image  tag  centos centos:zqf

清除无效镜像

我们可以清理无效的镜像。所谓的无效的镜像我们指的就是没有镜像名称和标签的。

docker image prune