下载build-essential及其所有递归依赖

```

mkdir -p build-essential-offline
cd build-essential-offline
# 使用 apt-get download 仅下载包而不安装
sudo apt-get update
apt-get download $(apt-cache depends --recurse --no-recommends --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances build-essential | grep "^\w" | sort -u)

```