Quickie: Remove All Untagged Docker Images

Here’s a quick one regarding deleting all untagged docker images. This occurred when docker image prune wasn’t deleting all the unused images I had.

A bit of googling found this wrong command:

docker rmi $(docker images | grep "^<none>" | awk "{print $3}")

Amazingly, this command was on a bunch of Stack Overflow posts and various blogs, yet for me the command just didn’t work. Firstly, the sub command wasn’t listing all the images and secondly the AWK command wasn’t working.

So with just a bit of tweaking, I got this

docker rmi $(docker images -a | grep "^<none>" | awk '{print $3}')

It might only be a couple of minor changes, but it made the difference! You can also swap the "^<none>" for any other string like "oracle" to filter different images.

Hopefully this helped you out! And you can see this working below:

[ec2-user@ip-10-0-183-23 ~]$ docker rmi -f $(docker images -a | grep "^<none>" | awk '{print $3}') 
Deleted: sha256:819f5fb82e4e84ef9f6a4c499794e7ff633142bc41da3d242b84012aee4a6107
Deleted: sha256:7d31f64668021acfde80ad52ff17ef129bac6f4ba0e102af71ed9e2faa7218bb
Deleted: sha256:9bbd7b6beb77f145f28b8e778fcd168ff0142a581d83871d22bdb339edce8e16
Deleted: sha256:5e65d9f730f3ea97e58266610e186e3423fa8dbcf43183d0763c6a9fc8cfefeb
Deleted: sha256:55c1eca785c7cd660f42749c623f4e60cc6d32e52397cda01ce5d4eab8d13131
Deleted: sha256:f4d619b209b5a07a6a365554233613ebd75e3002f8c2ea3198828674238cef24
Deleted: sha256:5ba856305748d36c328d01346f383b3bc7ea97abc439ae5707f75789f2ba7037
Deleted: sha256:e216d97404d66f06b58d0ac8722cf3e3674ec76b58c74d429167d00bfb9c3304
Deleted: sha256:98eafcd4f66683380c2fed6849a8d16749e6df0b7d6634eb5fd134ad3f483d4d
Written on March 18, 2020

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