**使用国内源替换原来的源：** ``` tee /etc/apt/sources.list > /dev/null <<EOF deb https://mirrors.aliyun.com/debian/ bullseye main non-free contrib deb-src https://mirrors.aliyun.com/debian/ bullseye main non-free contrib deb https://mirrors.aliyun.com/debian-security/ bullseye-security main deb-src https://mirrors.aliyun.com/debian-security/ bullseye-security main deb https://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib deb-src https://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib #deb https://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib #deb-src https://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib EOF ``` **全局禁用所有 HTTPS 源验证**： ``` echo 'Acquire::https::Verify-Peer "false"; Acquire::https::Verify-Host "false";' | tee /etc/apt/apt.conf.d/99ssl-bypass ``` **更新 CA 根证书:** ``` sudo apt update sudo apt install --reinstall ca-certificates sudo update-ca-certificates --fresh ``` **删除/etc/apt/apt.conf.d/99ssl-bypass** **完成！**