Ubuntu 14.04 DNS 配置

最近得到一个比较好用的DNS,每次重启后都修改DNS配置文件 /etc/resolv.conf 重启就会失效

从网上得知 /etc/resolv.conf中的DNS配置是从/etc/resolvconf/resolv.conf.d/head中加载而来,所以每回改resolv.conf都会失效,在此文件里面已经有说明

打开/etc/resolv.conf内容如下:cat /etc/resolv.conf

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)# DO NOT EDIT THIS FILE BY HAND — YOUR CHANGES WILL BE OVERWRITTEN

内容是一段警告:说这个文件是resolvconf程序动态创建的,不要直接手动编辑,修改将被覆盖。

所以我们不能直接修改这个文件了

查资料得到两种方法:

方法1:

sudo vim /etc/network/interfaces
dns-nameservers 8.8.8.8

方法2:(这个文件默认是空的)

sudo vim /etc/resolvconf/resolv.conf.d/base
nameserver 8.8.8.8
nameserver 8.8.4.4

如果有多个DNS就一行一个

修改好保存,然后执行

resolvconf -u

sudo vim /etc/resolvconf/resolv.conf.d/head

打开里面显示如下

再看/etc/resolv.conf,最下面就多了2行:

cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 8.8.8.8
nameserver 8.8.4.4

现在此DNS已经生效了,无需重启,当然重启也不会丢失

此外还有一种方法是修改/etc/resolvconf/resolv.conf.d/head

sudo vim /etc/resolvconf/resolv.conf.d/head

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