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GET STARTED DOCKER

Docker1) Install Docker on your VM with the help of the following commands (only for Ubuntu and Debian Operating Systems)

install packages:

sudo apt update
sudo apt install -y \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg \
    lsb-release \
    jq

Add Docker’s official GPG key:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

setup repository:

echo \
  "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Install Docker Engine:

sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io
Add your user to the docker group:

sudo usermod -aG docker $USER

Docker Compose download the current stable release of Docker Compose:

COMPOSE_VERSION=$(curl -s "https://api.github.com/repos/docker/compose/tags" | jq -r '.[0].name')
sudo curl -L "https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-$(uname -s)-$(uname -m)" \
  -o /usr/local/bin/docker-compose

Apply executable permissions to the binary:

sudo chmod +x /usr/local/bin/docker-compose

2)Pull nginx & hello-world:

    docker pull hello-world
    docker pull nginx

3)Port forward nginx to port 80:
docker run --name mynginxl -p 80:80 -d nginx

Open your public ip after successfully executing this command.

4)View images:

docker images

5)Pull apache2:

docker pull ubuntu/apache2

  1. Kill nginx to allocate port 80 to apache2:
    docker kill <container_id_nginx>

To grab the container id of nginx, run docker ps

  1. Finally, port apache2 to port 80:
    docker run --name apache -p 80:80 -d ubuntu/apache2

    and reopen your public ip.(see your public ip change)