获取 ubuntu:18.04 镜像，并创建一个容器
docker pull ubuntu:18.04
docker run --name ubuntu -itd ubuntu:18.04 bash
docker exec -it ubuntu bash
配置软件源
apt-get update
apt-get install vim -y
cd /etc/apt/sources.list.d/
vim 163.list
```
deb http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse
```
apt-get update
安装 SSH 服务
apt-get install openssh-server
需要正常启动 SSH 服务，则目录 /var/run/sshd 必须存在。下面手动创建它，并启动 SSH 服务
mkdir -p /var/run/sshd
/usr/sbin/sshd -D &
查看容器的 22 端口
apt-get install net-tools -y
netstat -tunlp
修改 SSH 服务的安全登录配置，取消 pam 登录限制
sed -ri 's/session required pam_loginuid.so/#session required pam_loginuid.so/g' /etc/pam.d/sshd
创建自动启动 SSH 服务的可执行文件 run.sh ，并添加可执行权限
passwd root
-> myadmin
vim /etc/ssh/sshd_config
```
PermitRootLogin yes
```
service ssh restart
修改 root 密码
passwd root
-> myadmin
vim /etc/ssh/sshd_config
```
PermitRootLogin yes
```
service ssh restart
保存镜像
docker commit ubuntu sshd-ubuntu:latest
使用镜像
docker run --name sshd -p 10022:22 -itd sshd-ubuntu:latest bash /run.sh
连接 ssh
ssh root@175.24.123.94 -p 10022
-> myadmin
