I've the following images: alex@alexvps:~$ sudo docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE <none> <none> 70c0e19168cf 5 days ago 1.069 GB <none> <none> c2ce80b62174 8 days ago 399.2 MB <none> <none> 60afe4036d97 8 days ago 325.1 MB and when I try to remove one of them I get: alex@alexvps:~$ sudo docker rmi 60afe4036d97 Error: Conflict, 60afe4036d97 wasn't deleted 2014/01/28 00:54:0
![How can I delete Docker's images?](https://cdn-ak-scissors.b.st-hatena.com/image/square/98d6f053a97a87156775f60757c60865d0f2c47d/height=288;version=1;width=512/https%3A%2F%2Fcdn.sstatic.net%2FSites%2Fstackoverflow%2FImg%2Fapple-touch-icon%402.png%3Fv%3D73d79a89bded)