Debian 10 不知何故完全坏了 apt-get update / upgrade 不起作用 ca-certificates 不起作用 我现在尝试修复它太久但没有任何效果。这就是为什么我希望有人可以在这里帮助我。我是 Linux Debian 的新手，不知道我到底做了什么._。已经谢谢你了：D
apt-get 更新
Err:2 https://packages.sury.org/php buster Release
Certificate verification failed: The certificate is NOT trusted. The certifica te issuer is unknown. Could not handshake: Error in the certificate verificatio n. [IP: 172.67.182.150 443]
Reading package lists... Done
W: https://packages.sury.org/php/dists/buster/InRelease: No system certificates available. Try installing ca-certificates.
W: https://packages.sury.org/php/dists/buster/Release: No system certificates av ailable. Try installing ca-certificates.
E: The repository 'https://packages.sury.org/php buster Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disa bled by default.
N: See apt-secure(8) manpage for repository creation and user configuration deta ```