获取镜像
[root@Proxy ~]# docker pull tomcat
Using default tag: latest
latest: Pulling from library/tomcat
7e2b2a5af8f6: Pull complete
09b6f03ffac4: Pull complete
dc3f0c679f0f: Pull complete
fd4b47407fc3: Pull complete
bb40faab53a2: Pull complete
1015b1b4c9ac: Pull complete
dc9b56c32795: Pull complete
7cc86ac3141b: Pull complete
a87d3a3ed1af: Pull complete
4ef7fc58bece: Pull complete
Digest: sha256:1458fb9bb9d3d46d3129f95849233e31d82391723830ebd61441c24635460b84
Status: Downloaded newer image for tomcat:latest
docker.io/library/tomcat:latest
查看Docker镜像
[root@Proxy ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat latest 31a47677561a 2 days ago 529MB
zabbix/zabbix-server-mysql latest fbc86ce35f52 2 weeks ago 64.7MB
zabbix/zabbix-web-nginx-mysql latest 0efb08709a91 2 weeks ago 167MB
mysql 5.7 413be204e9c3 2 weeks ago 456MB
zabbix/zabbix-agent centos-4.4-latest 322c6c685990 3 weeks ago 229MB
Docker体积
[root@Proxy ~]# docker system df
TYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 5 0 1.44GB 1.44GB (100%)
Containers 0 0 0B 0B
Local Volumes 19 0 312.8MB 312.8MB (100%)
Build Cache 0 0 0B 0B
Docker 删除镜像
[root@Proxy ~]# docker rmi nginx
Untagged: nginx:latest
Untagged: nginx@sha256:d81f010955749350ef31a119fb94b180fde8b2f157da351ff5667ae037968b28
Deleted: sha256:e791337790a6181d5ce870b3bb16de1a4d5aa3a916e8fba6907f57eb409934cf
Deleted: sha256:615a169a3412634ebf75d5f0f5162290fb6042ba36285bd0ddc9ee123165b95e
Deleted: sha256:bd32d67adcec3dba661c5afebc8a2a5413e68a3283b5ad7df134ed86f00b380a
Deleted: sha256:b60e5c3bcef2f42ec42648b3acf7baf6de1fa780ca16d9180f3b4a3f266fe7bc
END