终端输入以下命令（命令会自动下载适合当前系统的最新版Checkra1n）：
echo "deb https://assets.checkra.in/debian /" | sudo tee -a /etc/apt/sources.list
sudo apt-key adv --fetch-keys https://assets.checkra.in/debian/archive.key
sudo apt update
然后安装最新版checkra1n：
sudo apt-get install checkra1n