docker启动并安装ssh

1.下载centos 镜像：docker pull centos:centos7.9.2009

2.第一次运行镜像：docker run -itd --name=centos --privileged -p 3333:22 centos:centos7.9.2009 /usr/sbin/init

3. 进入容器：docker exec -it centos /bin/bash

3. yum install -y openssl openssh-server openssh-clients

4. /etc/ssh/sshd_config 文件： PermitRootLogin去掉注释修改为yes，port 22 去掉注释

5. 修改密码：passwd root

6.启动ssh服务：systemctl start sshd.service
7.ssh开机启动：systemctl enable sshd.service