1. Information

2. Linux

2.1. Installation

  • Enter the following commands at a Command Line.

    # Uninstall all conflicting packages.
sudo apt remove $(dpkg --get-selections docker.io docker-compose docker-doc podman-docker containerd runc | cut -f1)

# Add Docker's official GPG key.
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add repository to Apt sources.
cat << EOF | sed -e "s/^  //" | sudo tee /etc/apt/sources.list.d/docker.sources
  Types: deb
  URIs: https://download.docker.com/linux/debian
  Suites: $(. /etc/os-release && echo "$VERSION_CODENAME")
  Components: stable
  Signed-By: /etc/apt/keyrings/docker.asc
EOF

ls -al /etc/apt/sources.list.d
cat /etc/apt/sources.list.d/docker.sources
sudo apt-get update

# Install latest version.
sudo apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

# Verify Docker is running.
sudo systemctl status docker

# Verify that installation is successful by running hello-world image.
sudo docker run hello-world

2.2. Configuration

  • Enter the following commands at a Command Line.

    # Configure Docker to start on boot with systemd.
sudo systemctl enable docker.service
sudo systemctl enable containerd.service

# Add user to docker group.
sudo usermod -aG docker $USER
cat /etc/group | grep -i docker

  • Log out and log in again.

2.3. Usage

  • Enter the following commands at a Command Line.

    sudo docker run --interactive --tty debian bash
# Do your thing.
exit

sudo ls -al /var/lib/docker/containers
docker ps --all

  • Contents of Dockerfile.

    FROM debian:latest

# See https://code.visualstudio.com/remote/advancedcontainers/add-nonroot-user

ARG USERNAME=delta
ARG USER_UID=1000
ARG USER_GID=$USER_UID

# Create the user
RUN groupadd --gid $USER_GID $USERNAME \
    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME \
    #
    # [Optional] Add sudo support. Omit if you don't need to install software after connecting.
    && apt-get update \
    && apt-get install -y sudo \
    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
    && chmod 0440 /etc/sudoers.d/$USERNAME

# ********************************************************
# * Anything else you want to do like clean up goes here *
# ********************************************************

# [Optional] Set the default user. Omit if you want to keep the default as root.
USER $USERNAME
    # Create Dockerfile
docker build -t delta/debian .
docker images
sudo docker run --interactive --rm --tty delta/debian bash
# Do your thing.
exit

# Remove all containers.
docker container prune
    # Create/change a root password in a running container.
docker exec --interactive --tty --user 0 <container> passwd

  • See https://www.baeldung.com/ops/root-user-password-docker-container.

    cat Dockerfile12
  FROM debian:latest
  RUN apt-get update
  RUN useradd --comment "Delta Software Labs" --create-home delta
  USER delta
  CMD ["/bin/bash"]

docker build --file Dockerfile12 --tag delta-debian .
docker run --detach --interactive --name delta-debian delta-debian
docker ps
docker exec --interactive --tty delta-debian bash
docker stop <id>
docker container prune

  • Enter the following commands at a Command Line.

    sudo docker run hello-world
sudo docker run --interactive --tty ubuntu /bin/bash
sudo docker run debian:8 /bin/echo 'Hello world'
sudo docker run ubuntu:14.04 /bin/echo 'Hello world'

  • In ~/.docker/config.json change credsStore to credStore.

docker network create nginx-proxy
docker run -p 8080:8080 lissy93/dashy

2.4. Connect to Running Container

  • Enter the following commands at a Command Line.

    docker ps

docker exec -it <container-name> /bin/bash
docker exec -it <container-name> /bin/sh