原文：http://www.simapple.com/341.html
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osted by simapple on Sunday, 10 August 2014
rmi 删除image
Usage: docker rmi IMAGE [IMAGE...]Remove one or more images
-f,--force=falseForce removal of the image
--no-prune=falseDonotdelete untagged parentsRemoving tagged images
Images can be removed either by their short or long ID`s, or their image names. If an image has more than one name, each of them needs to be removed before the image is removed.
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
test1 latest fd484f19954f 23 seconds ago 7 B (virtual4.964 MB)
test latest fd484f19954f 23 seconds ago 7 B (virtual4.964 MB)
test2 latest fd484f19954f 23 seconds ago 7 B (virtual4.964 MB)
$ sudo docker rmi fd484f19954f（指定通过id来删除就会有问题，一个id可能被多个名字引用！）
Error:Conflict, cannot delete image fd484f19954f because it is tagged in multiple repositories
2013/12/1105:47:16Error: failed to remove one or more images
$ sudo docker rmi test1(指定image的名字删除，就可以)
Untagged: fd484f19954f4920da7ff372b5067f5b7ddb2fd3830cecd17b96ea9e286ba5b8
$ sudo docker rmi test2
Untagged: fd484f19954f4920da7ff372b5067f5b7ddb2fd3830cecd17b96ea9e286ba5b8
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
test latest fd484f19954f 23 seconds ago 7 B (virtual4.964 MB)
$ sudo docker rmi test
Untagged: fd484f19954f4920da7ff372b5067f5b7ddb2fd3830cecd17b96ea9e286ba5b8
Deleted: fd484f19954f4920da7ff372b5067f5b7ddb2fd3830cecd17b96ea9e286ba5b8