为什么不能解析名字？
像其他一些问题一样 ，我有时无法运行apt-get update 。 重新启动或等待一段时间会使问题消失。 我从未遇到过在浏览器中ping或访问相应URL的问题。
我已经尝试过每一个投票的答案都无济于事。 什么是这样做ping或我的浏览器是如此不同？ 例如，当我运行apt-get update我看到：
Err:1 https://download.docker.com/linux/ubuntu xenial InRelease Could not resolve host: download.docker.com Err:2 https://deb.opera.com/opera-stable stable InRelease Could not resolve host: deb.opera.com Err:3 http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu xenial InRelease Could not resolve 'ppa.launchpad.net' Err:4 http://ppa.launchpad.net/saiarcot895/myppa/ubuntu xenial InRelease Could not resolve 'ppa.launchpad.net' Err:5 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu xenial InRelease Could not resolve 'ppa.launchpad.net' Err:6 http://repository.spotify.com stable InRelease Could not resolve 'repository.spotify.com' Err:7 http://dl.google.com/linux/chrome/deb stable InRelease Could not resolve 'dl.google.com' Err:8 http://archive.ubuntu.com/ubuntu xenial InRelease Could not resolve 'archive.ubuntu.com' Err:9 http://archive.ubuntu.com/ubuntu xenial-updates InRelease Could not resolve 'archive.ubuntu.com' Err:10 http://archive.ubuntu.com/ubuntu xenial-backports InRelease Could not resolve 'archive.ubuntu.com' Err:11 http://archive.ubuntu.com/ubuntu xenial-security InRelease Could not resolve 'archive.ubuntu.com' Reading package lists... Done W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/InRelease Could not resolve 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease Could not resolve 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease Could not resolve 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-security/InRelease Could not resolve 'archive.ubuntu.com' W: Failed to fetch https://download.docker.com/linux/ubuntu/dists/xenial/InRelease Could not resolve host: download.docker.com W: Failed to fetch http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu/dists/xenial/InRelease Could not resolve 'ppa.launchpad.net' W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/InRelease Could not resolve 'dl.google.com' W: Failed to fetch https://deb.opera.com/opera-stable/dists/stable/InRelease Could not resolve host: deb.opera.com W: Failed to fetch http://ppa.launchpad.net/saiarcot895/myppa/ubuntu/dists/xenial/InRelease Could not resolve 'ppa.launchpad.net' W: Failed to fetch http://repository.spotify.com/dists/stable/InRelease Could not resolve 'repository.spotify.com' W: Failed to fetch http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu/dists/xenial/InRelease Could not resolve 'ppa.launchpad.net' W: Some index files failed to download. They have been ignored, or old ones used instead.
运行ping download.docker.com ：
PING d2h67oheeuigaw.cloudfront.net (52.85.41.233) 56(84) bytes of data. 64 bytes from server-52-85-41-233.mel50.r.cloudfront.net (52.85.41.233): icmp_seq=1 ttl=251 time=18.8 ms 64 bytes from server-52-85-41-233.mel50.r.cloudfront.net (52.85.41.233): icmp_seq=2 ttl=251 time=18.4 ms 64 bytes from server-52-85-41-233.mel50.r.cloudfront.net (52.85.41.233): icmp_seq=3 ttl=251 time=19.5 ms
在我的浏览器中访问该页面工作正常。 我怎样才能让apt-get “正常工作”？
这是我的/etc/apt/resolv.conf的内容：
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 127.0.1.1 search home.gateway
从终端运行此命令，您可以在将来正常使用apt和apt-get 🙂
echo 'Acquire::ForceIPv4 "true";' | sudo tee /etc/apt/apt.conf.d/99force-ipv4
如果存在/etc/atp/apt.conf ，请复制该文件，然后编辑原始文件以注释掉以下行：
Acquire::http::Proxy "http://proxyaddress:proxyport";