导出镜像快照
ubuntu@ubuntu18:/tmp$ docker export test4 > test4.tar
ubuntu@ubuntu18:/tmp$ ls
config-err-X1JlNt systemd-private-351c5609dd694b98a5ca0e42b1ec52d7-systemd-resolved.service-SAHMlc
snap.docker systemd-private-351c5609dd694b98a5ca0e42b1ec52d7-systemd-timesyncd.service-epByy6
ssh-4CudbCufMIfk test4.tar
systemd-private-351c5609dd694b98a5ca0e42b1ec52d7-bolt.service-ewZ2ld VMwareDnD
导入镜像快照
ubuntu@ubuntu18:/tmp$ cat test4.tar | docker import - test4:0.1
sha256:ece6e7bf2d448d1adbdc79493d135c77008942532d3891c27dd21fe6a8f6a551
ubuntu@ubuntu18:/tmp$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
test4 0.1 ece6e7bf2d44 4 seconds ago 64.2MB
flag 0.1 5822df4da7a2 25 hours ago 64.2MB
myubuntu18 latest ccc6e87d482b 5 weeks ago 64.2MB
ubuntu 18.04 ccc6e87d482b 5 weeks ago 64.2MB
ubuntu 14.04 6e4f1fe62ff1 2 months ago 197MB