Docker has created a number of images

Docker Engine Compose
1

Hello,
I ran the docker compose build command several times and when I check the images, I see a number of images:

# docker images
REPOSITORY           TAG                        IMAGE ID       CREATED             SIZE
m-site               latest                     4a57fb36850c   5 minutes ago       2.4GB
php                  fpm-alpine3.20             cb53db6e58bd   About an hour ago   906MB
site-backend         latest                     fda40e53dd4a   24 hours ago        906MB
laravel-backend      latest                     0f21561f6174   24 hours ago        915MB
<none>               <none>                     dfca7af469e9   24 hours ago        915MB
<none>               <none>                     5bbc4edb3d37   24 hours ago        915MB
<none>               <none>                     40172e27f58a   24 hours ago        915MB
<none>               <none>                     f9257d8e470d   24 hours ago        915MB
<none>               <none>                     b2d485ae8b06   25 hours ago        915MB
<none>               <none>                     f74cd7175f13   25 hours ago        906MB
<none>               <none>                     55f47c9eb0bb   25 hours ago        906MB
<none>               <none>                     208d6febdf51   41 hours ago        905MB
<none>               <none>                     a3f379d0e44e   41 hours ago        758MB
<none>               <none>                     b18fec781de9   43 hours ago        758MB
<none>               <none>                     9623e61309c5   43 hours ago        758MB
<none>               <none>                     a9d16ecb7ea9   47 hours ago        758MB
<none>               <none>                     4c81ae6e3db7   47 hours ago        749MB
<none>               <none>                     4965ac6769ee   47 hours ago        746MB
php                  8.3                        b3bb0b693946   2 days ago          940MB
<none>               <none>                     8281f2262260   2 days ago          937MB
portal-site          latest                     c95676900c0a   2 days ago          2.4GB
php                  8.3.20RC1-zts-alpine3.21   e489387959df   6 days ago          123MB
node                 23-alpine                  017616c34fba   2 weeks ago         162MB
php                  8.3-fpm                    b0746539b4e2   2 weeks ago         497MB
mariadb              latest                     a914eff5d2eb   6 weeks ago         336MB
nginx                alpine                     1ff4bb4faebc   8 weeks ago         47.9MB
nginx                latest                     53a18edff809   8 weeks ago         192MB
phpmyadmin           latest                     052506f2de4d   2 months ago        570MB
node                 <none>                     3d4b037e6712   10 months ago       1.11GB

I have two questions:

1- Some of these images have <none> in front of them. How do I know which of these images I can delete?

2- How do I name them so I know which container they are for?

Thank you.

2

1- The images with <none> were previously tagged, but then replaced when you built a new image with the same tag, now they’re dangling and can be removed as you wish.
docker image prune removes all dangling unused images

2- As answered previously, they were named, but you have replaced them, so they’re made for no container anymore

1 Like
3

Hello,
Thank you so much.