# 卸载旧版（如有）
for pkg in docker.io docker-doc docker-compose; do sudo apt remove -y $pkg; done

# 安装依赖
sudo apt install -y ca-certificates curl

# 添加 Docker GPG 密钥
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

# 添加官方源
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# 安装最新版 Docker CE
sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin

# 免 sudo 使用
sudo usermod -aG docker $USER
newgrp docker