启动ubuntu:18.04容器
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sudo docker run -it --name first ubuntu:18.04 /bin/bash
容器里的操作
更新源
首先将原文件重命名为备份：
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mv /etc/apt/sources.list /etc/apt/sources.list.bak
接着加入阿里源，并更新：
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echo "deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse" >> /etc/apt/sources.list;
echo "deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse" >> /etc/apt/sources.list;
echo "deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse" >> /etc/apt/sources.list;
echo "deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse" >> /etc/apt/sources.list;
echo "deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse" >> /etc/apt/sources.list;
echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse" >> /etc/apt/sources.list;
echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse" >> /etc/apt/sources.list;
echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse" >> /etc/apt/sources.list;
echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse" >> /etc/apt/sources.list;
echo "deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse" >> /etc/apt/sources.list;
apt update
安装vim和sshd
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apt install vim -y
apt-get install openssh-server -y
修改root密码
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passwd root
启动sshd
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首先修改sshd配置：
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vim /etc/ssh/sshd_config
改成下面两项
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PermitRootLogin yes UsePAM no
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启动sshd服务
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service ssh start
Run容器中的sshd服务
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退出容器后，提交容器为新的镜像
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sudo docker commit first ubuntu18.04:ssh
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用新镜像启动sshd
后台运行sshd，且把主机1022端口映射到容器的22端口。
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sudo docker run --name u18_04 -d -p 1022:22 ubuntu18.04:ssh /usr/sbin/sshd -D
这样可以通过1022端口登录（root）到容器。
设置开机启动
设置docker开机启动
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systemctl enable docker
设置容器自启动
依赖于docker已经启动。
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docker update --restart=always u18_04
