![无法解析主机名](https://linux22.com/image/192510/%E6%97%A0%E6%B3%95%E8%A7%A3%E6%9E%90%E4%B8%BB%E6%9C%BA%E5%90%8D.png)
所以我的 centos 8 服务器突然遇到了解析主机名的问题。它使用与我的笔记本电脑相同的 DNS (192.168.1.1)(工作正常)。我不知道如何开始解决这个问题。
host unix.stackexchange.com
:
Host unix.stackexchange.com not found: 2(SERVFAIL)
cat /etc/resolv.conf
:
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.
nameserver 127.0.0.53
resolvectl
:
Global
LLMNR setting: yes
MulticastDNS setting: yes
DNSOverTLS setting: no
DNSSEC setting: allow-downgrade
DNSSEC supported: yes
DNSSEC NTA: 10.in-addr.arpa
16.172.in-addr.arpa
168.192.in-addr.arpa
17.172.in-addr.arpa
18.172.in-addr.arpa
19.172.in-addr.arpa
20.172.in-addr.arpa
21.172.in-addr.arpa
22.172.in-addr.arpa
23.172.in-addr.arpa
24.172.in-addr.arpa
25.172.in-addr.arpa
26.172.in-addr.arpa
27.172.in-addr.arpa
28.172.in-addr.arpa
29.172.in-addr.arpa
30.172.in-addr.arpa
31.172.in-addr.arpa
corp
d.f.ip6.arpa
home
internal
intranet
lan
local
private
test
Link 4 (virbr0-nic)
Current Scopes: none
LLMNR setting: yes
MulticastDNS setting: no
DNSOverTLS setting: no
DNSSEC setting: allow-downgrade
DNSSEC supported: yes
Link 3 (virbr0)
Current Scopes: none
LLMNR setting: yes
MulticastDNS setting: no
DNSOverTLS setting: no
DNSSEC setting: allow-downgrade
DNSSEC supported: yes
Link 2 (enp1s0)
Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
LLMNR setting: yes
MulticastDNS setting: no
DNSOverTLS setting: no
DNSSEC setting: allow-downgrade
DNSSEC supported: yes
Current DNS Server: 192.168.1.1
DNS Servers: 192.168.1.1
ping -c4 8.8.8.8
:
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=251 time=5.54 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=251 time=5.47 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=251 time=5.51 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=251 time=5.45 ms
--- 8.8.8.8 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 5.445/5.490/5.536/0.081 ms
答案1
通过以下方式对 DNS 进行硬编码手动配置 /ETC/RESOLV.CONF 文件我成功了。然而,很高兴知道它第一次坏掉的原因。