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Docker - Ubuntu SSH Setup
Luke 我什麼都不會
  2024-11-20   2025-07-14  330 Words  2 Mins

Docker - Ubuntu SSH Setup

Host: Use the same port -> just change to the SSH port that does not conflict with NAS.

Environment Settings for Ubuntu Container

Dockerfile

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FROM ubuntu:latest
RUN apt-get update && apt-get install -y openssh-server
RUN mkdir /var/run/sshd
RUN echo 'root:your_password' | chpasswd
RUN sed -i 's/PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config
RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd

# Other installations
RUN apt-get upgrade -y
RUN apt-get install -y sudo nano vim curl git

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

Docker Build and Push to Docker Hub

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docker build -t ubuntu_ssh .
docker tag ubuntu_ssh wulukewu/ubuntu_ssh:latest
docker push wulukewu/ubuntu_ssh:latest

Install OpenSSH-Server

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apt-get update 
apt-get install -y openssh-server
mkdir /var/run/sshd
echo 'root:your_password' | chpasswd
sed -i 's/PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config
sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd
/usr/sbin/sshd -D

Pull and Run the ubuntu_ssh Image

Pull ubuntu_ssh from Docker Hub

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sudo docker pull wulukewu/ubuntu_ssh:latest

Run ubuntu_ssh in Host

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sudo docker run -d --net=host --name ubuntu_ssh wulukewu/ubuntu_ssh:latest

Access the Ubuntu Container

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sudo docker exec -i -t ubuntu_ssh /bin/bash

Hostname Configuration

Change Hostname

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sudo nano /etc/hostname
sudo nano /etc/hosts
sudo reboot

Display the Current Hostname

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hostname

SSH Configuration

Change SSH Port

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sudo nano /etc/ssh/sshd_config
service ssh restart

User Management

Add a New Sudo User

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adduser user_name

Add the User to the Sudo Group

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usermod -aG sudo user_name
usermod -aG root user_name

Change User Password

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sudo passwd user_name

Test Sudo Access

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su - user_name

References

Docker - Ubuntu SSH Setup
2024/11/docker-ubuntu-ssh-setup/
Author
Luke
Published
2024-11-20 20:51
License
  1. Docker - Ubuntu SSH Setup
    1. Environment Settings for Ubuntu Container
      1. Dockerfile
      2. Docker Build and Push to Docker Hub
      3. Install OpenSSH-Server
    2. Pull and Run the ubuntu_ssh Image
      1. Pull ubuntu_ssh from Docker Hub
      2. Run ubuntu_ssh in Host
      3. Access the Ubuntu Container
    3. Hostname Configuration
      1. Change Hostname
      2. Display the Current Hostname
    4. SSH Configuration
      1. Change SSH Port
    5. User Management
      1. Add a New Sudo User
      2. Add the User to the Sudo Group
      3. Change User Password
      4. Test Sudo Access
    6. References
© 2024 - 2025    Luke
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  1. Docker - Ubuntu SSH Setup
    1. Environment Settings for Ubuntu Container
      1. Dockerfile
      2. Docker Build and Push to Docker Hub
      3. Install OpenSSH-Server
    2. Pull and Run the ubuntu_ssh Image
      1. Pull ubuntu_ssh from Docker Hub
      2. Run ubuntu_ssh in Host
      3. Access the Ubuntu Container
    3. Hostname Configuration
      1. Change Hostname
      2. Display the Current Hostname
    4. SSH Configuration
      1. Change SSH Port
    5. User Management
      1. Add a New Sudo User
      2. Add the User to the Sudo Group
      3. Change User Password
      4. Test Sudo Access
    6. References