Ubuntu設定永久DNS
阿新 • • 發佈:2021-01-12
有時候會出現配置好網路之後,可以
ping
通閘道器卻ping
不通www.baidu.com
orangepi@orangepi3:~$ ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. 64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=94.1 ms 64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=6.14 ms 64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=6.02 ms ^C --- 192.168.1.1 ping statistics --- 4 packets transmitted, 3 received, 25% packet loss, time 3025ms rtt min/avg/max/mdev = 6.026/35.455/94.192/41.533 ms orangepi@orangepi3:~$ ping www.baidu.com ping: www.baidu.com: Name or service not known
出現上面所顯示的情況,多數原因是因為沒有正確的配置DNS
(域名解析服務)。
解決方法
修改檔案/etc/resolv.conf
sudo vim /etc/resolv.conf
修改為
# Generated by NetworkManager
nameserver 8.8.8.8
nameserver 114.114.114.114
如果有更多的NDS
,可以繼續新增nameserver x.x.x.x
,不出意外,修改完過一會兒,應該就能成功ping
通。
orangepi@orangepi3:~$ ping www.baidu.com PING www.a.shifen.com (14.215.177.38) 56(84) bytes of data. 64 bytes from 14.215.177.38 (14.215.177.38): icmp_seq=2 ttl=56 time=8.49 ms 64 bytes from 14.215.177.38 (14.215.177.38): icmp_seq=3 ttl=56 time=9.15 ms 64 bytes from 14.215.177.38 (14.215.177.38): icmp_seq=4 ttl=56 time=13.1 ms 64 bytes from 14.215.177.38 (14.215.177.38): icmp_seq=5 ttl=56 time=7.44 ms 64 bytes from 14.215.177.38 (14.215.177.38): icmp_seq=6 ttl=56 time=12.7 ms ^C --- www.a.shifen.com ping statistics --- 6 packets transmitted, 5 received, 16% packet loss, time 331074581ms rtt min/avg/max/mdev = 7.440/10.198/13.169/2.317 ms
但是這個方式重啟之後就會失去效果,想要永久生效,可以採用第二個
修改檔案/etc/resolvconf/resolv.conf.d/base
sudo vim /etc/resolvconf/resolv.conf.d/base
這裡我修改的是
/etc/resolvconf/resolv.conf.d/head
檔案,我發現效果是一樣的,因為我修改base
沒有生效。
增加DNS
nameserver 8.8.8.8
nameserver 114.114.114.114
執行resolvconf -u
更新resolv.conf
檔案
然後就和上面效果效果相同了,之後重啟也能生效了。