1. 问题
安装软件时，ubuntu 22.04系统提示：Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification.
sh
After this operation, 19.4 MB of additional disk space will be used.
Ign:1 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 flex amd64 2.6.4-8build2
Ign:2 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 bison amd64 2:3.8.2+dfsg-1build1
Ign:3 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 zlib1g-dev amd64 1:1.2.11.dfsg-2ubuntu9.2
Ign:4 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libelf-dev amd64 0.186-1build1
Ign:5 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libfl2 amd64 2.6.4-8build2
Ign:6 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libfl-dev amd64 2.6.4-8build2
Ign:7 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 libncurses-dev amd64 6.3-2ubuntu0.1
Ign:8 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 libssl-dev amd64 3.0.2-0ubuntu1.10
Ign:1 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 flex amd64 2.6.4-8build2
Ign:2 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 bison amd64 2:3.8.2+dfsg-1build1
Ign:3 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 zlib1g-dev amd64 1:1.2.11.dfsg-2ubuntu9.2
Ign:4 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libelf-dev amd64 0.186-1build1
Ign:5 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libfl2 amd64 2.6.4-8build2
Ign:6 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libfl-dev amd64 2.6.4-8build2
Ign:7 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 libncurses-dev amd64 6.3-2ubuntu0.1
Ign:8 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 libssl-dev amd64 3.0.2-0ubuntu1.10
Ign:1 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 flex amd64 2.6.4-8build2
Ign:2 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 bison amd64 2:3.8.2+dfsg-1build1
Ign:3 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 zlib1g-dev amd64 1:1.2.11.dfsg-2ubuntu9.2
Ign:4 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libelf-dev amd64 0.186-1build1
Ign:5 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libfl2 amd64 2.6.4-8build2
Ign:6 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libfl-dev amd64 2.6.4-8build2
Ign:7 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 libncurses-dev amd64 6.3-2ubuntu0.1
Ign:8 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 libssl-dev amd64 3.0.2-0ubuntu1.10
Err:1 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 flex amd64 2.6.4-8build2
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
Err:2 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 bison amd64 2:3.8.2+dfsg-1build1
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
Ign:3 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 zlib1g-dev amd64 1:1.2.11.dfsg-2ubuntu9.2
Err:4 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libelf-dev amd64 0.186-1build1
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
Err:5 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libfl2 amd64 2.6.4-8build2
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
Err:6 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/main amd64 libfl-dev amd64 2.6.4-8build2
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
Ign:7 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 libncurses-dev amd64 6.3-2ubuntu0.1
Get:3 http://security.ubuntu.com/ubuntu jammy-updates/main amd64 zlib1g-dev amd64 1:1.2.11.dfsg-2ubuntu9.2 [164 kB]
Ign:8 https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates/main amd64 libssl-dev amd64 3.0.2-0ubuntu1.10
Get:7 http://security.ubuntu.com/ubuntu jammy-updates/main amd64 libncurses-dev amd64 6.3-2ubuntu0.1 [381 kB]
Get:8 http://security.ubuntu.com/ubuntu jammy-updates/main amd64 libssl-dev amd64 3.0.2-0ubuntu1.10 [2372 kB]
Fetched 2916 kB in 12s (238 kB/s)
E: Failed to fetch https://mirrors.tuna.tsinghua.edu.cn/ubuntu/pool/main/f/flex/flex_2.6.4-8build2_amd64.deb Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
E: Failed to fetch https://mirrors.tuna.tsinghua.edu.cn/ubuntu/pool/main/b/bison/bison_3.8.2%2bdfsg-1build1_amd64.deb Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
E: Failed to fetch https://mirrors.tuna.tsinghua.edu.cn/ubuntu/pool/main/e/elfutils/libelf-dev_0.186-1build1_amd64.deb Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
E: Failed to fetch https://mirrors.tuna.tsinghua.edu.cn/ubuntu/pool/main/f/flex/libfl2_2.6.4-8build2_amd64.deb Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
E: Failed to fetch https://mirrors.tuna.tsinghua.edu.cn/ubuntu/pool/main/f/flex/libfl-dev_2.6.4-8build2_amd64.deb Certificate verification failed: The certificate is NOT trusted. The certificate chain uses not yet valid certificate. Could not handshake: Error in the certificate verification. [IP: 101.6.15.130 443]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?2. 原因
当前系统的时间不对，我使用的是虚拟机，关闭过一段时间；一旦长时间关机，导致系统时间和真实时间差异较大，chrony就不会自动同步时间
3. 解决方案
手动同步时间即可，我使用的是chrony，因此执行：chronyc -a makestep命令即可同步时间。
时间正确之后，就可以愉快的安装软件啦！！！