Dockerfile
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FROM ubuntu:18.04
RUN sed -i 's/archive.ubuntu.com/mirrors.aliyun.com/g' /etc/apt/sources.list
RUN sed -i 's/security.ubuntu.com/mirrors.aliyun.com/g' /etc/apt/sources.list
RUN useradd -m test123 -s /bin/bash
RUN echo 'test123\ntest123' | passwd test123
上述 Dockerfile 创建一个 test123 的用户，并设置其密码为 test123
创建 docker image
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#!/bin/bash
docker build -t test123:1804 .