Docker - Untagged images

sudo docker images --filter "dangling=true"

$ sudo docker images --filter "dangling=true"


REPOSITORY  TAG          IMAGE ID        CREATED     VIRTUAL SIZE
none                       8c39e8847482        5 hours ago         4.799 GB
none                        1e422624b663        5 hours ago         4.799 GB
none                        889bb1e7a182        7 hours ago         361.7 MB

This will display untagged images, that are the leaves of the images tree (not intermediary layers). These images occur when a new build of an image takes the repo:tag away from the image ID, leaving it untagged. A warning will be issued if trying to remove an image when a container is presently using it. By having this flag it allows for batch cleanup.

To remove untagged images

$ sudo docker rmi $(sudo docker images -f "dangling=true" -q)

Deleted: 8c39e8847482dc326fe38a0ad081d6f07692cf960ad8a60b9dbcd23e8e5f8237
Deleted: 5352141119ef008c0f8b86c716fff56b193b51cd24275e6865155e82a68d90d1
Deleted: 1e422624b663f5bcc17942311ee0bf6c050a3c72287edb00b55b9b7150c84038
Deleted: 43b55a8043f57522807cb4fd2e3801730b0d1d5bfe06c56138cc724be31f9a3f
Deleted: 42cc277fae8850bc2d2238b09932bc158f82d85df6d14491628da13bc9f8f5d7
Deleted: 3770e4be4740d3826f3084d0edfa63376605804c37f0c1f8d3de540562cad3ad
Deleted: ecafe52bc8ecf1195dbbb4654e5f3627f9607dce5cc7015e2fe1d667083b3a19
Deleted: 0c2ed3587fa939e32af3a5330a8a93c19bd210dc0d1c6cbf3e2da4e04b1eec44
Deleted: 5b5278f9083cb4c05a673698c83890977ffd21e11f2047a6731361ffa5bac6dd
Deleted: 33d4b2ed6b3885493892e17a642f5535bccc68deebfab82e9f97aa4942b37c05
Deleted: bbf510a7340697608c24e61be82ca0e12ea7be746806f481f8da0dec4e1f33b1
Deleted: 39288867bab065f8bf297f0a9c1708615e42427435666380c510540abfc39589
Deleted: ac25dd76fbcfd9c9108669f020b1d5d4eff77030591a4ce2fb346d14677c9b02
Deleted: 66247125226f32376d3731e9294f069e87c94dbd97b5cb29fc4d3cfa78092f13
Deleted: 6109906a8f91f6c72dbc24e5b23ec981f4f6ea27b2cfe47bec6a4c1d0b7ec71b
Deleted: 883939159dd96fd6cf40b3bc0fa0ae1d71dc2cc4aebb187948bb3bc5b6013959
Deleted: 889bb1e7a182d2e6a146cf4fb72015171f8c4fcb58b2294650db02126d7287d3
Deleted: ab174de7a01d3c8a10fb003e2fbb296f7d2dca21c2485f88f0afaadcb82e4def
Deleted: f31fa04bf31d366f9b72d49dce13b15cb2aafcae232d872164beb56c4c3bd178
Deleted: 40a48a6b1f4b31498047e0f3b918071f6ca9597994266a45fce7b39d929971c3
Deleted: 809eb6bc51974ebc6d5949c31db89ff46f8b9ef8b7259b8c99019b62eff49b4b
Deleted: 006f1bd2da6d5f834ad6d2402d8c1155aace711e3434904be3483e6c6861e97d
Deleted: 0c92cae6419cb1d6982698baebc26006c48b06f66b1c31a2add81e1518093b0d
Deleted: c602b1c4d4cbe989db12e0e07b55315fc1f950f8982dc23b0aaac83b9d7322e0
Deleted: d4718839b6a8e008c6873ded5bd023e2952f583982ab4e0c6a69f4133c047785
Deleted: 55d2c09e4784bdd28972b3fe0f6900ba1f2dee323192e989648be0495417cba1
Deleted: 20afcdfe2ea7b5d6e4cc541c4a66f0cf7395b1520a14c36ad7b89bf703250586

This give me around 10GB free disk space.