Repository und GPG-Key hinzufügen:

sudo apt install ca-certificates curl gnupg lsb-release -y
sudo install -m 0755 -d /etc/apt/keyrings

curl -fsSL https://download.docker.com/linux/ubuntu/gpg \
  | gpg --dearmor -o /etc/apt/keyrings/docker.gpg

chmod a+r /etc/apt/keyrings/docker.gpg

Repository eintragen:

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/null

Aktualisieren:

sudo apt update