务必注意时效性!
日期:2021.12.26
https://github.com/tuna/issues/issues/1342
ca-certificates
ml@ml-virtual-machine:/etc/apt$ sudo apt install ca-certificates Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be upgraded: ca-certificates ... done.
ml@ml-virtual-machine:/etc/apt$ sudo cp sources.list.th.bak sources.list ml@ml-virtual-machine:/etc/apt$ sudo apt update Get:1 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal InRelease [265 kB] Get:2 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-updates InRelease [114 kB] ... 149 packages can be upgraded. Run 'apt list --upgradable' to see them.
ml@ml-virtual-machine:/etc/apt$ sudo apt update Ign:1 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal InRelease Ign:2 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-updates InRelease Ign:3 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-backports InRelease Ign:4 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-security InRelease Err:5 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal Release Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443] Err:6 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-updates Release Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443] Err:7 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-backports Release Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443] Err:8 https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-security Release Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443] Reading package lists... Done E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-updates Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-backports Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu focal-security Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.