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如果不使用 VPN，Ubuntu 16.04 LTS 就无法连接到互联网

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如果不使用 VPN，Ubuntu 16.04 LTS 就无法连接到互联网

我是 Linux 新手。我一直以为是 wifi 驱动程序出了问题，直到我发现使用 VPN 时可以连接到网络。直到今天我的互联网都运行良好。我需要能够在不使用 VPN 的情况下连接到网络。

我收到的消息如下：

Firefox can’t find the server at www.google.com.

在终端上：

$ uname -a  
Linux MisterX 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

$ ping google.com
ping: unknown host google.com

$ dig google.com  
; <<>> DiG 9.10.3-P4-Ubuntu <<>> google.com
;; global options: +cmd
;; connection timed out; no servers could be reached

$ ping ping 216.58.208.78
PING 216.58.208.78 (216.58.208.78) 56(84) bytes of data.
64 bytes from 216.58.208.78: icmp_seq=1 ttl=48 time=230 ms
64 bytes from 216.58.208.78: icmp_seq=2 ttl=48 time=226 ms
64 bytes from 216.58.208.78: icmp_seq=3 ttl=48 time=249 ms
64 bytes from 216.58.208.78: icmp_seq=4 ttl=48 time=224 ms
^C
--- 216.58.208.78 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3002ms
rtt min/avg/max/mdev = 224.005/232.736/249.737/10.094 ms

$ dig 216.58.208.78
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 216.58.208.78
;; global options: +cmd
;; connection timed out; no servers could be reached

$ sudo nano /etc/nsswitch.conf
passwd:         compat
group:          compat
shadow:         compat
gshadow:        files

hosts:          files mdns4_minimal [NOTFOUND=return] dns
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis

我努力了：

$ sudo /etc/init.d/network-manager restart
[ ok ] Restarting network-manager (via systemctl): network-manager.service.

答案1

最后，它适用于以下两者：

第一的 （https://askubuntu.com/a/164351/664380）

$ sudo mv /etc/resolv.conf /etc/backup.resolv.conf

然后，运行（https://askubuntu.com/a/835198/664380）

$ ifconfig

并查看网络适配器的名称。我的是：enp0s31f6

现在运行这个命令

$ sudo nano /etc/network/interfaces

你应该在里面得到一些东西....删除所有内容并粘贴这个（但更改 enp0s31f6 所在的网络适配器名称）：

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback


# The primary network interface
auto enp0s31f6
iface enp0s31f6 inet dhcp

保存文档并重新启动...

就我而言，我仅在 /etc/network/interfaces 中有以下三行

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

我必须补充一下

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

及以下：

# The primary network interface
auto enp0s31f6
iface enp0s31f6 inet dhcp

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