Ubuntu 安装 Docker 教程（官方推荐方式）

✅ 步骤 1：卸载旧版本（如果有）

for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done```---### ✅ 步骤 2：更新 APT 索引并安装依赖项```bash
sudo apt-get update
sudo apt-get install -y \ca-certificates \curl \gnupg \lsb-release

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✅ 步骤 3：添加 Docker 官方 GPG 密钥

# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get 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

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✅ 步骤 4：设置 Docker 软件源

# Add the repository to Apt sources:
echo \"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \$(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

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✅ 步骤 5：安装 Docker 引擎

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

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✅ 步骤 6：验证安装

sudo docker run hello-world

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✅ 步骤 7（可选）：让当前用户可以不用 sudo 使用 docker

sudo usermod -aG docker $USER
newgrp docker

重新登录后就可以直接运行：

docker ps

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🎉 安装成功！

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如果你想一键脚本安装

curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh ./get-docker.sh