Ubuntu安装docker

官方教程：

Install Docker Engine on Ubuntu | Docker Documentation

sudo apt-get update
sudo apt-get install ca-certificates curl gnupg  lsb-release

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

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

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

启动docker服务：

不然会报错：docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.

service docker start

sudo docker run hello-world