45 lines
1.3 KiB
Markdown
45 lines
1.3 KiB
Markdown
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---
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id: "20211019"
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date: "2021-10-19 15:42:00"
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title: "NetworkManager如何自定义dns,永久生效"
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tags: ["linux", "NetworkManger"]
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categories:
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- "linux"
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- "program"
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---
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## 前言
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目前比较新的linux发行版都默认使用NetworkManger来管理网络了，然后如何自定义dns就成了一个比较麻烦的事，每次NetworkManager启动都会覆盖`/etc/resolv.conf`文件，特别是使用dhcp获取ip时，dns地址会变成dhcp服务器默认的dns.那么有哪些解决办法呢？
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## 修改/etc/resolv.conf
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既然这个文件会被NetworkManager修改，那么让它改不了就行了。将resolv.conf设置为不可修改。命令如下：
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```bash
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sudo chattr +i /etc/resolv.conf
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```
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这样我们自定义dns后就不会被NetworkManager重新覆盖了。
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<!-- more -->
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## 更幽雅的配置
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上面虽然能达到目的，但是不太幽雅。其实NetworkManager是支持自定义dns的，办法如下:
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1. 修改/etc/NetworkManager/conf.d/dns.conf(如没有此文件，新建即可),增加如下两行配置：
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```conf
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[main]
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dns=null
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```
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2. 修改/etc/NetworkManager/conf.d/dns-servers.conf(如没有此文件，新建即可),增加如下两行配置,设置自定义dns：
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```conf
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[global-dns-domain-*]
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servers=::1,127.0.0.1,8.8.8.8
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```
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3. 重启软件`sudo systemctl restart NetworkManager`
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大功告成～
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