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如何修复名称解析失败

tag-icon • tag-icon kubuntu dns cloud hostname resolv.conf
如何修复名称解析失败

我有一个相当新的 Kubuntu 安装并且我以某种方式弄乱了它的名称解析。

root @ asus-f751s ~ # host www.ecosia.org                                                                                                                  22-12-19 12:05
;; communications error to 127.0.0.1#53: connection refused

root @ asus-f751s ~ :-( # ls -l /etc/resolv.conf                                                                                                           22-12-19 12:20
lrwxrwxrwx 1 root root 27 Dec 19 11:30 /etc/resolv.conf -> /run/resolvconf/resolv.conf
root @ asus-f751s ~ # ls -l /run/resolvconf/resolv.conf                                                                                                    22-12-19 12:20
ls: cannot access '/run/resolvconf/resolv.conf': No such file or directory
root @ asus-f751s ~ :-( # systemctl | grep -Fi resol                                                                                                           22-12-19 12:04
  systemd-resolved.service                                                                 loaded active running   Network Name Resolution

名称解析守护进程似乎正在运行，从上面的代码片段可以看出。我不确定解析状态是否没有可疑之处。resolv.conf 模式被告知丢失，但如果它指的是文件，则没有新信息。

root @ asus-f751s ~ :-( # resolvectl status                                                                                                                22-12-19 12:21
Global
       Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: missing

Link 2 (enp2s0f1)
Current Scopes: none
     Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

Link 3 (wlp3s0)
Current Scopes: DNS
     Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
   DNS Servers: 192.168.2.1 fe80::1%21849
    DNS Domain: speedport.ip

甚至连运行目录都丢失了。

root @ asus-f751s ~ # echo "nameserver 192.168.2.1                                                                                                         22-12-19 12:32
nameserver fe80::1%wlp3s0
search speedport.ip" > /run/resolvconf/resolv.conf
zsh: no such file or directory: /run/resolvconf/resolv.conf
root @ asus-f751s ~ :-( # ls -l /run/resolvconf                                                                                                            22-12-19 12:32
ls: cannot access '/run/resolvconf': No such file or directory

我可以实现临时修复（重启后它就消失了）

root @ asus-f751s ~ # mkdir /run/resolvconf                                                                                                            22-12-19 12:32
root @ asus-f751s ~ # echo "nameserver 192.168.2.1                                                                                                         22-12-19 12:33
nameserver fe80::1%wlp3s0
search speedport.ip" > /run/resolvconf/resolv.conf
root @ asus-f751s ~ # host www.ecosia.org                                                                                                                  22-12-19 12:33
www.ecosia.org is an alias for www.ecosia.org.cdn.cloudflare.net.
www.ecosia.org.cdn.cloudflare.net has address 104.18.14.27
www.ecosia.org.cdn.cloudflare.net has address 104.18.15.27
www.ecosia.org.cdn.cloudflare.net has IPv6 address 2606:4700::6812:f1b
www.ecosia.org.cdn.cloudflare.net has IPv6 address 2606:4700::6812:e1b

但我希望有一个永久的解决方案。

如果有人能启发我，我会很高兴。

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