Docker is an open software platform that allows you to build, test, and run applications in containers. Docker has an official repository for Ubuntu, so you can easily install it using apt package manager. Here are the steps to install Docker on Ubuntu 22.04.
Open a terminal window on your Ubuntu 22.04 server and update the local package database to ensure you have the latest information about available packages:
```bash sudo apt update ```
Before installing Docker, you’ll need to make sure that some required packages are installed. You can do this with the following command:
```bash sudo apt install -y apt-transport-https ca-certificates curl software-properties-common ```
Docker provides an official repository that contains the Docker package for Ubuntu. You can add this repository to your system:
```bash curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg ```
Next, add the Docker repository to your sources list:
```bash 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 ```
Update the package list again to include the Docker repository, and then install Docker:
```bash sudo apt update sudo apt install -y docker-ce docker-ce-cli containerd.io ```
Docker should start automatically after installation, but you can ensure it’s enabled to start on boot with:
```bash sudo systemctl enable docker ```
To verify that Docker has been installed successfully, you can check the version:
```bash docker --version ```
This should display the installed Docker version.
You can also run a simple test to verify that Docker is working correctly. Try running the following command, which should pull a small test image and run it in a container:
```bash sudo docker run hello-world ```
If everything is set up correctly, you’ll see a message confirming that your installation appears to be working correctly.
That’s it! Docker is now installed on your Ubuntu 22.04 system. You can start using Docker to manage and run containers.
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