Docker Installation
Before using Docker, you need to install it on your system. Here are the installation methods for major operating systems.
Install Docker on Ubuntu/Debian
This is how to install Docker on Ubuntu or Debian-based systems. It is recommended to remove any previously installed Docker versions first.
Remove old Docker packages
sudo apt-get remove docker docker-engine docker.io containerd runcRemoves any previously installed Docker-related packages.
Install necessary packages for Docker
sudo apt-get update
sudo apt-get install ca-certificates curl gnupgInstalls the dependency packages required for Docker installation.
Add Docker's official GPG key
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpgAdds the GPG key for the Docker APT repository to ensure package authenticity.
Set up the Docker APT repository
echo \
"deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
"$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/nullAdds the APT repository to your system to download Docker packages.
Install Docker Engine
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-pluginInstalls the latest Docker Engine, containerd, and Docker Compose.
Verify Docker installation
sudo docker run hello-worldRuns the 'hello-world' image to verify that Docker is installed correctly.
Use Docker without sudo (optional)
To run Docker commands without using `sudo` every time, you need to add your current user to the `docker` group. This change will take effect after you log out and log back in.
Add user to docker group
sudo usermod -aG docker ${USER}Adds the current user to the `docker` group.
Main Docker Commands
These are the core commands used to manage Docker containers, images, volumes, and more. Combine each option to perform the desired tasks.
1. Container Management
2. Image Management
3. Network and Volume Management
4. System Management
Generated command:
Try combining the commands.
Description:
`docker` Executes the command.
Combine the above options to virtually execute commands with AI.
Usage Examples
Manage your container environment effectively with these practical examples of Docker commands.
Run an Nginx web server container
docker run -d --name my-nginx -p 80:80 nginxRuns an Nginx web server container in the background, accessible on port 80. The container name is 'my-nginx'.
Access inside a container (bash shell)
docker exec -it my-nginx bashConnects to the bash shell inside the running 'my-nginx' container. (Useful for working inside the container)
Force remove a specific container
docker rm -f my-containerForcefully removes a container named 'my-container', whether it is running or stopped.
Build a Docker image and tag it
docker build -t my-app:v1.0 .Builds a Docker image named 'my-app' using the Dockerfile in the current directory. The tag is 'v1.0'.
Remove all stopped containers
docker rm $(docker ps -aq)Removes all stopped containers that are no longer in use to free up disk space.