docker save -o 要保存的文件名  要保存的鏡像

[root@iZbp16cdvzk4rhl0vn1gedZ ~]# ls
aaa.cap  install.sh  mobile-1.0.0-SNAPSHOT.jar  sa_recovery.log
[root@iZbp16cdvzk4rhl0vn1gedZ ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
bb                  v1.0                3b8d26737bcb        10 minutes ago      202MB
centos              latest              9f38484d220f        3 weeks ago         202MB
java                latest              d23bdf5b1b1b        2 years ago         643MB
[root@iZbp16cdvzk4rhl0vn1gedZ ~]# docker save -o cc.tar bb:v1.0
[root@iZbp16cdvzk4rhl0vn1gedZ ~]# ls
aaa.cap  cc.tar  install.sh  mobile-1.0.0-SNAPSHOT.jar  sa_recovery.log

docker load --input 文件
或者
docker load < 文件名

[root@iZbp16cdvzk4rhl0vn1gedZ ~]# docker rmi centos:latest bb:v1.0

Untagged: bb:v1.0
Deleted: sha256:3b8d26737bcb99aa12ef55c6e9620720b0ad85ecdee9cd52fbb5d5e1a2da2591
Untagged: centos:latest
Untagged: centos@sha256:8d487d68857f5bc9595793279b33d082b03713341ddec91054382641d14db861
Deleted: sha256:9f38484d220fa527b1fb19747638497179500a1bed8bf0498eb788229229e6e1
Deleted: sha256:d69483a6face4499acb974449d1303591fcbb5cdce5420f36f8a6607bda11854

[root@iZbp16cdvzk4rhl0vn1gedZ ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
java                latest              d23bdf5b1b1b        2 years ago         643MB

[root@iZbp16cdvzk4rhl0vn1gedZ ~]# docker load < cc.tar 

d69483a6face: Loading layer [==================================================>]  209.5MB/209.5MB
Loaded image: bb:v1.0

[root@iZbp16cdvzk4rhl0vn1gedZ ~]# docker images 

REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
bb                  v1.0                3b8d26737bcb        15 minutes ago      202MB
java                latest              d23bdf5b1b1b        2 years ago         643MB