bash
FROM ubuntu:20.04
#设置非交互 不然会卡tzdata
ENV DEBIAN_FRONTEND noninteractive
ENV TZ=Asia/Shanghai LANG=C.UTF-8
#换阿里云源以及安装runner依赖
RUN sed -i s@/archive.ubuntu.com/@/mirrors.aliyun.com/@g /etc/apt/sources.list && apt update \
        && apt install -y openssh-server gettext  texinfo  bison autoconf wget patch texinfo dos2unix  simg2img  libssl-dev  u-boot-tools  gperf  ctags  git-core gnupg flex bison build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 libncurses5 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z1-dev libgl1-mesa-dev libxml2-utils xsltproc unzip fontconfig  openssl  libssl-dev  python2.7
#开启root登录
RUN echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
#设置root密码
RUN echo "root:passwd" | chpasswd
#开启ssh
RUN service ssh restart
#设置工作目录
WORKDIR /data/docker-data

bash
#查看当前系统版本
[root@localhost ~]# cat /etc/r

错误情况：

bash
ip | UNREACHABLE! => {
    "cha