vi /etc/apt/apt.conf.d/99disable-signature-verification
添加以下内容：
Acquire::AllowInsecureRepositories "true";
Acquire::AllowDowngradeToInsecureRepositories "true";
Acquire::AllowUnauthenticated "true";
参考链接：
apt-secure(8) — apt — Debian unstable — Debian Manpages
