修改配置文件


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sudo vim /etc/dhcpcd.conf

增加如下内容，我们使用Google DNS（北京联通测试速度不错）



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static domain_name_servers=8.8.8.8 8.8.4.4

完整的示例文件部分



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interface eth0
ip_address=192.168.1.3/24
routers=192.168.1.1
domain_name_servers=8.8.8.8 8.8.4.4

设置配置生效



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sudo service dhcpcd restart

验证是否生效

我们使用dig命令验证dns是否生效



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dig droidyue.com

; <<>> DiG 9.11.5-P4-5.1-Raspbian <<>> droidyue.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54841
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;droidyue.com.            IN  A

;; ANSWER SECTION:
droidyue.com.     299 IN  A   104.27.129.205
droidyue.com.     299 IN  A   104.27.128.205

;; Query time: 44 msec
;; SERVER: 8.8.8.8#53(8.8.8.8);; WHEN: Sun Apr 19 17:07:11 CST 2020
;; MSG SIZE  rcvd: 73

重点看这个信息



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;; Query time: 44 msec
;; SERVER: 8.8.8.8#53(8.8.8.8);; WHEN: Sun Apr 19 17:07:11 CST 2020
;; MSG SIZE  rcvd: 73

注意

不要直接修改这个文件​​/etc/resolv.conf​​



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# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTENnameserver 8.8.8.8
nameserver fe80::1%eth0
You have new mail in /var/mail/pi

正如上面英文说得，这个文件会被冲掉，未来某个时间你还需要重新设置。所以按照文章中的修改即可。