How to install Docker in Linux system

Docker is a popular containerization engine that allows developers to easily use various components in applications. How to install Docker server? This article will introduce you to how to install Docker in Linux operating system.

1. Update Server

Before installing Docker, it is recommended to update the server. The server can be updated using the following command:

sudo apt-get update
sudo apt-get upgrade

2. Install Docker from the Docker official repository

Before starting the installation, you need to add the Docker official repository to install Docker. The official repository can be added using the following command:

sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common

Then, verify the integrity of the installation files by adding the Docker official GPG key.

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Next, add the Docker repository to the server’s APT repository.

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

Finally, use the following command to install the Docker engine.

sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io

3. Verify whether Docker is installed successfully

After the installation is completed, you can verify whether Docker is installed successfully. The Docker version can be verified using the following command:

docker --version

If the Docker installation is successful, it will display the Docker version.

4. Start using Docker

Now that Docker has been successfully installed on the server, you can start using it. Use the following command to view Docker activity:

sudo systemctl status docker

Start the Docker service:

sudo systemctl start docker

Stop the Docker service:

sudo systemctl stop docker

Restart the Docker service:

sudo systemctl restart docker

5. Install Docker-Compose

Docker-Compose is a tool for defining and running multi-container applications. Use the following command to install Docker-Compose:

sudo curl -L "https://github.com/docker/compose/releases/download/{docker-compose-version}/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

Don’t forget to replace {docker-compose-version} with the version of Docker-Compose you want to install. Run the following command to set permissions:

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

Finally, run the following command to verify whether Docker-Compose is installed successfully:

docker-compose --version

The above is how to install Docker server and Docker-Compose on a Linux system . By following these steps, you can start developing and deploying Dockerized applications in no time.

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