可以使用 docker pull 指令下载 busybox:latest 镜像：
PS C:\Users\yhu> docker pull busybox:latest
latest: Pulling from library/busybox
ec562eabd705: Pull complete
Digest: sha256:5eef5ed34e1e1ff0a4ae850395cbf665c4de6b4b83a32a0bc7bcb998e24e7bbb
Status: Downloaded newer image for busybox:latest
docker.io/library/busybox:latest
What's Next?
View a summary of image vulnerabilities and recommendations → docker scout quickview busybox:latest
PS C:\Users\yhu>
下载后，可以看到 busybox 镜像只有 4.26 MB：
PS C:\Users\yhu> docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
repo-docker.isharkfly.com/docker-hub/visatrack latest a329341dbaeb 3 days ago 522MB
repo-docker.isharkfly.com/docker-hub/visatrack <none> f5f9d8b3b410 3 days ago 522MB
alpine/git latest 80ed206c002b 7 days ago 50.4MB
data-mq-service 0.0.1-SNAPSHOT 7eb277a365d6 3 weeks ago 475MB
docsify-docs 0.0.1 32062033284a 6 weeks ago 1.13GB
<none> <none> 0ebfbefe1d52 6 weeks ago 1.13GB
alpine latest 05455a08881e 3 months ago 7.38MB
zchub-crawler latest b20aa408fe8f 7 months ago 1.6GB
mq-service 0.0.1-SNAPSHOT 308dd50eb67a 7 months ago 441MB
reso-web-api-reference-server-odata-manager-app latest 27cdaae03879 8 months ago 441MB
reso-builder latest cabba9a35a22 8 months ago 1.47GB
busybox latest 65ad0d468eb1 11 months ago 4.26MB
tutor-service 0.0.1-SNAPSHOT 20d2f52a1fc4 13 months ago 521MB
sharkfly-wechat-service 0.0.1-SNAPSHOT 0d3e7843994e 13 months ago 465MB
eclipse-temurin 17-jdk-alpine 9a0a4e74d117 13 months ago 358MB
rabbitmq 3.11-management 04a3a28a368b 13 months ago 255MB
framework-spring-docker 0.0.1-SNAPSHOT 42e51829e8c7 15 months ago 379MB
adoptopenjdk/openjdk11-openj9 alpine b533cd6150ba 15 months ago 379MB
mysql/mysql-server latest 1d9c2219ff69 16 months ago 496MB
docker101tutorial latest e60bd4e10534 17 months ago 47MB
alpine/git <none> 22d84a66cda4 17 months ago 43.6MB
PS C:\Users\yhu>
如果只说是大小来说，Alpine 也大不了多少，但 Alpine 提供了更多的功能。
这也就是为什么 Docker 官方切换到 Alpine 的原因。