[root@localhost docker]# systemctl start docker
[root@localhost docker]# systemctl enable docker #开机启动
[root@localhost docker]# systemctl start docker #开启
[root@localhost docker]# systemctl stop docker #关闭
[root@localhost docker]# docker search mysql #找镜像
[root@localhost docker]# docker pull mysql:5.7 #下载镜像
[root@localhost docker]# docker images #查看镜像
[root@localhost docker]# docker rmi f6509bac4980 #删除镜像 f6509bac4980为IMAGE ID
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[root@localhost docker]# docker run -itd --name mytomcat tomcat:latest # 给容器命(mytomcat) -d 后台运行