Dockerfile from Ubuntu 16.04 with OpenSSH

dockerfile

FROM ubuntu:16.04
MAINTAINER Sunny Srinidhi <sunny.3mysore@gmail.com>

RUN apt-get update
RUN apt-get install -y openssh-server
RUN cp /etc/ssh/sshd_config /etc/ssh/sshd_config.original
RUN chmod a-w /etc/ssh/sshd_config.original
RUN mkdir /var/run/sshd
RUN echo "root:secret" | chpasswd
RUN sed -i 's/PermitRootLogin without-password/PermitRootLogin yes/' /etc/ssh/sshd_config

# SSH login fix. Otherwise user is kicked off after login
RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd

ENV NOTVISIBLE "in users profile"
RUN echo "export VISIBLE=now" >> /etc/profile

CMD ["/usr/sbin/sshd", "-D"]
EXPOSE 22