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[v_act]Docker环境上的一切操作都基于镜像之上的，所以我们先来了解下镜像的基本管理，简单管理是基于单镜像操作的。[/v_act]
显示本地镜像列表（等同于docker images）：docker image ls
[root@localhost ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
thehunt33r/docker-brimir latest b7bf3e5cd2cf 2 years ago 1.19GB查询镜像：docker search nginx
[root@localhost ~]# docker search nginx
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
nginx Official build of Nginx. 10800 [OK]
jwilder/nginx-proxy Automated Nginx reverse proxy for docker con… 1512 [OK]
richarvey/nginx-php-fpm Container running Nginx + PHP-FPM capable of… 678 [OK]
jrcs/letsencrypt-nginx-proxy-companion LetsEncrypt container to use with nginx as p… 472 [OK]
webdevops/php-nginx Nginx with PHP-FPM 122 [OK]
kitematic/hello-world-nginx A light-weight nginx container that demonstr… 119
zabbix/zabbix-web-nginx-mysql Zabbix frontend based on Nginx web-server wi… 86 [OK]
bitnami/nginx Bitnami nginx Docker Image 60 [OK]
linuxserver/nginx An Nginx container, brought to you by LinuxS… 53
1and1internet/ubuntu-16-nginx-php-phpmyadmin-mysql-5 ubuntu-16-nginx-php-phpmyadmin-mysql-5 48 [OK]
tobi312/rpi-nginx NGINX on Raspberry Pi / armhf 24 [OK]
nginx/nginx-ingress NGINX Ingress Controller for Kubernetes 15
blacklabelops/nginx Dockerized Nginx Reverse Proxy Server. 12 [OK]
wodby/drupal-nginx Nginx for Drupal container image 11 [OK]
centos/nginx-18-centos7 Platform for running nginx 1.8 or building n… 10
nginxdemos/hello NGINX webserver that serves a simple page co… 10 [OK]
webdevops/nginx Nginx container 8 [OK]
centos/nginx-112-centos7 Platform for running nginx 1.12 or building … 6
1science/nginx Nginx Docker images that include Consul Temp… 4 [OK]
pebbletech/nginx-proxy nginx-proxy sets up a container running ngin… 2 [OK]
travix/nginx NGinx reverse proxy 2 [OK]
mailu/nginx Mailu nginx frontend 2 [OK]
toccoag/openshift-nginx Nginx reverse proxy for Nice running on same… 1 [OK]
ansibleplaybookbundle/nginx-apb An APB to deploy NGINX 0 [OK]
wodby/nginx Generic nginx下载镜像（等同于docker pull）：docker image pull nginx #不指定版本标签为直接下载latest最新版本（版本标签查询：hub.docker.com）
[root@localhost ~]# docker image pull nginx
Using default tag: latest
latest: Pulling from library/nginx
5e6ec7f28fb7: Pull complete
ab804f9bbcbe: Pull complete
052b395f16bc: Pull complete
Digest: sha256:56bcd35e8433343dbae0484ed5b740843dd8bff9479400990f251c13bbb94763
Status: Downloaded newer image for nginx:latest
[root@localhost ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 42b4762643dc 7 days ago 109MB
thehunt33r/docker-brimir latest b7bf3e5cd2cf 2 years ago 1.19GB删除本地Docker镜像（等同于docker rmi）:docker image rm nginx
[root@localhost ~]# docker image rm nginx
Untagged: nginx:latest
Untagged: nginx@sha256:56bcd35e8433343dbae0484ed5b740843dd8bff9479400990f251c13bbb94763
Deleted: sha256:42b4762643dcc9bf492b08064b55fef64942f055f0da91289a8abf93c6d6b43c
Deleted: sha256:e0e55dd2303b3e3ec852acae267d1f8a3eea27a22c64a5829304ecee4d3f559c
Deleted: sha256:4062cf272cdd99e83b1c21f712e5e1359c91ecf92925e56c62133c3324b84e45
Deleted: sha256:3c816b4ead84066ec2cadec2b943993aaacc3fe35fcd77ada3d09dc4f3937313[root@localhost ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
thehunt33r/docker-brimir latest b7bf3e5cd2cf 2 years ago 1.19GB
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