1.编写dockerfile文件

FROM centos
MAINTAINER YY<1184143438@qq.com>
ENV MYPATH /usr/local
WORKDIR  $MYPATH


RUN  yum -y install vim
RUN yum -y install net-tools

EXPOSE 80

CMD echo $MYPATH
CMD echo ">>>>>..."
CMD /bin/bash

2.构建镜像

docker build -f dokcerfile-centos -t mycentos:1.0 .