Dockerfile构建镜像-基础

• Dockerfile

# this is a dockerfile
FROM centos:7
MAINTAINER XD 123456@qq.com RUN echo "正在构建镜像!!!" WORKDIR /home/xdclass
COPY 123.txt /home/xdclass
RUN yum install -y net-tools

• docker build -t mycentos:v3
• docker images
• 进入验证