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CA文件：/etc/ssl/certs/ca-certificates.crt CRL文件

tag-icon • tag-icon 14.04 16.04 upgrade updates certificates
CA文件：/etc/ssl/certs/ca-certificates.crt CRL文件

我正在尝试将 Ubuntu 14.04 LTS 服务器升级到 16.04。但每次运行时都会返回以下错误：sudo http_proxy="http://usrid:[email protected]:8080" apt update

错误信息

Err http://apt.llvm.org llvm-toolchain-trusty-4.0/main amd64 Packages
  server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
Err http://apt.llvm.org llvm-toolchain-trusty-4.0/main i386 Packages
  server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
Err http://apt.llvm.org llvm-toolchain-trusty-5.0/main amd64 Packages
  server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
Err http://apt.llvm.org llvm-toolchain-trusty-5.0/main i386 Packages
  server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

: GPG error: http://extras.ubuntu.com trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192
W: Failed to fetch http://apt.llvm.org/trusty/dists/llvm-toolchain-trusty-4.0/main/binary-amd64/Packages  server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

W: Failed to fetch http://apt.llvm.org/trusty/dists/llvm-toolchain-trusty-4.0/main/binary-i386/Packages  server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

W: Failed to fetch http://apt.llvm.org/trusty/dists/llvm-toolchain-trusty-5.0/main/binary-amd64/Packages  server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

W: Failed to fetch http://apt.llvm.org/trusty/dists/llvm-toolchain-trusty-5.0/main/binary-i386/Packages  server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

E: Some index files failed to download. They have been ignored, or old ones used instead.

解决方案已尝试但仍然没有成功：

  1. 更新ca-certificates;
  2. apt-get install --reinstall ca-certificates；
  3. 检查sources.list，它是默认的ubuntu信任源；

当前 Ubuntu 14.04

~$ cat /etc/os-release
NAME="Ubuntu"
VERSION="14.04.1 LTS, Trusty Tahr"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.04.1 LTS"
VERSION_ID="14.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"

我想知道这个问题是否与我的代理设置有关。但我以前尝试过使用代理进行升级，效果很好。如果您有任何建议，请告诉我！我将不胜感激。

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