Mac
docker --version
Docker version 20.10.12, build e91ed57


docker desktop
4.5.0 (74594)

Engine: 20.10.12
Compose: v2.2.3
Credential Helper: 0.6.4
Kubernetes: v1.22.5
Snyk: v1.827.0


docker pull centos:7

7: Pulling from library/centos
Digest: sha256:c73f515d06b0fa07bb18d8202035e739a494ce760aa73129f60f4bf2bd22b407
Status: Image is up to date for centos:7
docker.io/library/centos:7


docker images 
REPOSITORY   TAG       IMAGE ID       CREATED        SIZE
busybox      latest    3c19bafed223   6 weeks ago    1.41MB
centos       7         c9a1fdca3387   5 months ago   301MB


uname -a 
uname -r
cat /etc/redhat-release

yum install file
file /bin/bash
getconf LONG_BIT

yum -y install python36
python3
python3 --version
Python 3.6.8

yum search java|grep jdk
yum install java-1.8.0-openjdk
java -version


访问外网测试
ping  codefun007.xyz




 docker挂载本地目录 
 linux内核版本与系统版本查看以及x86与x86_64的区别   
 docker命令实战