Difference between revisions of "Docker tutorial"
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===Install using the apt repository=== | ===Install using the apt repository=== | ||
'''Before you install Docker Engine for the first time on a new host machine, you need to set up the Docker apt repository. Afterward, you can install and update Docker from the repository.''' | '''Before you install Docker Engine for the first time on a new host machine, you need to set up the Docker apt repository. Afterward, you can install and update Docker from the repository.''' | ||
<code> | |||
# Add Docker's official GPG key: | |||
sudo apt update | |||
sudo apt install ca-certificates curl | |||
sudo install -m 0755 -d /etc/apt/keyrings | |||
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc | |||
sudo chmod a+r /etc/apt/keyrings/docker.asc | |||
# Add the repository to Apt sources: | |||
sudo tee /etc/apt/sources.list.d/docker.sources <<EOF | |||
Types: deb | |||
URIs: https://download.docker.com/linux/ubuntu | |||
Suites: $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") | |||
Components: stable | |||
Architectures: $(dpkg --print-architecture) | |||
Signed-By: /etc/apt/keyrings/docker.asc | |||
EOF | |||
sudo apt update | |||
</code> | |||
==[[Docker]]== | ==[[Docker]]== | ||
Revision as of 17:36, 5 November 2026
Installing Docker on Ubuntu =
Uninstall old version first
sudo apt remove $(dpkg --get-selections docker.io docker-compose docker-compose-v2 docker-doc docker-buildx podman-docker containerd runc | cut -f1)
apt might report that you have none of these packages installed.
Images, containers, volumes, and networks stored in /var/lib/docker/ aren't automatically removed when you uninstall Docker. If you want to start with a clean installation, and prefer to clean up any existing data, read the uninstall Docker Engine section [1].
Install using the apt repository
Before you install Docker Engine for the first time on a new host machine, you need to set up the Docker apt repository. Afterward, you can install and update Docker from the repository.
- Add Docker's official GPG key:
sudo apt update
sudo apt install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc
- Add the repository to Apt sources:
sudo tee /etc/apt/sources.list.d/docker.sources <<EOF
Types: deb
URIs: https://download.docker.com/linux/ubuntu
Suites: $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}")
Components: stable
Architectures: $(dpkg --print-architecture)
Signed-By: /etc/apt/keyrings/docker.asc
EOF
sudo apt update