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安装和更新

tag-icon • tag-icon 18.04 updates
安装和更新

当 ubuntu 18.04 LTS 连接到我的家庭 wifi 调制解调器时，它在尝试更新或安装软件时不断出现此错误（我确定计算机可以访问互联网，因为浏览器正在运行）

sudo apt-get update
Hit:1 http://security.ubuntu.com/ubuntu bionic-security InRelease           
Err:2 http://ir.archive.ubuntu.com/ubuntu bionic InRelease
   Connection failed [IP: 185.142.156.14 80]
Err:3 http://ir.archive.ubuntu.com/ubuntu bionic-updates InRelease
   Connection failed [IP: 185.142.156.14 80]
Err:4 http://ir.archive.ubuntu.com/ubuntu bionic-backports InRelease
   Connection failed [IP: 185.142.156.14 80]
Reading package lists... Done
W: Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/bionic/InRelease  Connection failed [IP: 185.142.156.14 80]
W: Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease  Connection failed [IP: 185.142.156.14 80]
W: Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/bionic-backports/InRelease  Connection failed [IP: 185.142.156.14 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.

但当我使用移动热点时，一切正常。有什么问题吗？

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