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运行 apt install ubuntu-restricted-extras 时收到连接失败 [IP: 91.189.91.38 80] 消息

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运行 apt install ubuntu-restricted-extras 时收到连接失败 [IP: 91.189.91.38 80] 消息

我刚买了一台新的戴尔电脑，并在其上安装了 Ubuntu 20.04.3 LTS。我尝试使用命令 sudo apt install ubuntu-restricted-extras 安装 ubuntu-restricted-extras，但得到以下输出：

Ign:1 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavutil56 amd64 7:4.2.4-1ubuntu0.1
Ign:2 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libswresample3 amd64 7:4.2.4-1ubuntu0.1
Ign:3 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavcodec-extra58 amd64 7:4.2.4-1ubuntu0.1
Ign:4 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavformat58 amd64 7:4.2.4-1ubuntu0.1
Err:5 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 libflite1 amd64 2.1-release-3
  Connection failed [IP: 91.189.91.39 80]
Ign:6 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libpostproc55 amd64 7:4.2.4-1ubuntu0.1
Ign:7 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libswscale5 amd64 7:4.2.4-1ubuntu0.1
Ign:8 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavfilter7 amd64 7:4.2.4-1ubuntu0.1
Ign:9 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavcodec-extra amd64 7:4.2.4-1ubuntu0.1
Err:1 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavutil56 amd64 7:4.2.4-1ubuntu0.1
  Connection failed [IP: 91.189.91.38 80]
Err:2 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libswresample3 amd64 7:4.2.4-1ubuntu0.1
  Connection failed [IP: 91.189.91.38 80]
Err:3 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavcodec-extra58 amd64 7:4.2.4-1ubuntu0.1
  Connection failed [IP: 91.189.91.38 80]
Err:4 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavformat58 amd64 7:4.2.4-1ubuntu0.1
  Connection failed [IP: 91.189.91.38 80]
Err:6 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libpostproc55 amd64 7:4.2.4-1ubuntu0.1
  Connection failed [IP: 91.189.91.38 80]
Err:7 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libswscale5 amd64 7:4.2.4-1ubuntu0.1
  Connection failed [IP: 91.189.91.38 80]
Err:8 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavfilter7 amd64 7:4.2.4-1ubuntu0.1
  Connection failed [IP: 91.189.91.38 80]
Err:9 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libavcodec-extra amd64 7:4.2.4-1ubuntu0.1
  Connection failed [IP: 91.189.91.39 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavutil56_4.2.4-1ubuntu0.1_amd64.deb  Connection failed [IP: 91.189.91.38 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libswresample3_4.2.4-1ubuntu0.1_amd64.deb  Connection failed [IP: 91.189.91.38 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavcodec-extra58_4.2.4-1ubuntu0.1_amd64.deb  Connection failed [IP: 91.189.91.38 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavformat58_4.2.4-1ubuntu0.1_amd64.deb  Connection failed [IP: 91.189.91.38 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/universe/f/flite/libflite1_2.1-release-3_amd64.deb  Connection failed [IP: 91.189.91.39 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libpostproc55_4.2.4-1ubuntu0.1_amd64.deb  Connection failed [IP: 91.189.91.38 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libswscale5_4.2.4-1ubuntu0.1_amd64.deb  Connection failed [IP: 91.189.91.38 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavfilter7_4.2.4-1ubuntu0.1_amd64.deb  Connection failed [IP: 91.189.91.38 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavcodec-extra_4.2.4-1ubuntu0.1_amd64.deb  Connection failed [IP: 91.189.91.39 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

我尝试运行 apt-get update 并尝试使用 --fix-missing，但仍然出现相同的错误。我尝试运行 apt-get clean，这稍微改变了错误消息，但基本上仍然是相同的问题。我尝试打开和关闭 VPN。我已 ping IP 地址 91.189.91.39，数据包丢失率为 0%，我可以毫无问题地浏览互联网。在 GUI 软件和更新窗口中，已选择 Multiverse 软件，我将服务器从中国更改为美国服务器。

我该怎么做才能解决这个问题？谢谢

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