Docker错误：ln：target'ps'不是目录
我有一个dockerfile与下面的命令：
RUN mkdir build run logs frontend/dist \ && apt-get -y install curl \ ... && ln -s /usr/bin/esmtp /usr/sbin/sendmaildocker ps 运行$ docker build -f Dockerfile -t tag-name . 我收到错误：
ebconf: unable to initialize frontend: Dialog debconf: (TERM is not set, so the dialog frontend is not usable.) debconf: falling back to frontend: Readline debconf: unable to initialize frontend: Readline debconf: (This frontend requires a controlling tty.) debconf: falling back to frontend: Teletype Processing triggers for libc-bin (2.19-0ubuntu6.9) ... ln: target 'ps' is not a directory The command '/bin/sh -c mkdir build run logs frontend/dist && apt-get -y install curl && curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash - && apt-get install -y nodejs && npm install gulp bower && npm cache clean && npm set progress=false && npm install --prefix frontend && apt-get update && apt-get install -y esmtp && ln -s /usr/bin/esmtp /usr/sbin/sendmaildocker ps' returned a non-zero code: 1
不得不删除最后的ps是一个错字：
&& ln -s /usr/bin/esmtp /usr/sbin/sendmaildocker