更新軟體源 sudo apt-get update
提示ca-certificates 錯誤 出現安全證書不信任的問題
Reading package lists... Done
W: https://mirrors.aliyun.com/debian/dists/bullseye/InRelease: No system certificates available. Try installing ca-certificates.
W: https://mirrors.aliyun.com/debian/dists/bullseye-updates/InRelease: No system certificates available. Try installing ca-certificates.
W: Failed to fetch https://mirrors.aliyun.com/debian/dists/bullseye/InRelease Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown. Could not handshake: Error in the certificate verification.
W: Failed to fetch https://mirrors.aliyun.com/debian/dists/bullseye-updates/InRelease Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown. Could not handshake: Error in the certificate verification.
W: Some index files failed to download. They have been ignored, or old ones used instead.
有三種解決辦法，使用其一即可。
把https協議換成http協議（未測試）
先安裝certificate庫（安裝命令為sudo apt install ca-certificates），再修改成阿里雲的源地址。有一種不配源怎麼安裝，不安裝怎麼配源的死鎖感😂（測試成功）
使用中科大的源，因為他們在這使用的是http協議（未測試）。
更換軟體源 提示證書錯誤