docker pull 命令

docker pull 命令用于拉取 Docker 镜像，以拉取 mysql 镜像为例：

1. 拉取最新版本

   # docker pull mysql 等于 docker pull mysql:latest
   # latest 是最新镜像
   ubuntu@HomeLab:~$ docker pull mysql
   Using default tag: latest
   latest: Pulling from library/mysql
   43759093d4f6: Pull complete 
   d255dceb9ed5: Pull complete 
   23d22e42ea50: Pull complete 
   431b106548a3: Pull complete 
   2be0d473cadf: Pull complete 
   f56a22f949f9: Pull complete 
   277ab5f6ddde: Pull complete 
   df1ba1ac457a: Pull complete 
   cc9646b08259: Pull complete 
   893b018337e2: Pull complete 
   Digest: sha256:146682692a3aa409eae7b7dc6a30f637c6cb49b6ca901c2cd160becc81127d3b
   Status: Downloaded newer image for mysql:latest
   docker.io/library/mysql:latest

2. 拉取指定版本

   ubuntu@HomeLab:~$ docker pull mysql:8.0.36
   8.0.36: Pulling from library/mysql
   bd37f6d99203: Pull complete 
   d2433cba0951: Pull complete 
   13702d9fe3c3: Pull complete 
   83bcc87284a1: Pull complete 
   c38d8660e1fa: Pull complete 
   7e1bc321f421: Pull complete 
   bddd54b9c549: Pull complete 
   4eaae1e844ac: Pull complete 
   5196e1e87d8f: Pull complete 
   6586d096303c: Pull complete 
   cf55ff1c80af: Pull complete 
   Digest: sha256:a532724022429812ec797c285c1b540a644c15e248579c6bfdf12a8fbaab4964
   Status: Downloaded newer image for mysql:8.0.36
   docker.io/library/mysql:8.0.36