Ubuntu 16.04.1 LTS ubuntu@ubuntu-W760-G20:~$ ping www.baidu.com ping: unknown host www.baidu.com ubuntu@ubuntu-W760-G20:~$ ping 192.168.205.122 PING 192.168.205.122 (192.168.205.122) 56(84) bytes of data. 64 bytes from 192.168.205.122: icmp_seq=1 ttl=64 time=0.107 ms ubuntu@ubuntu-W760-G20:~$ ping 114.114.114.114 PING 114.114.114.114 (114.114.114.114) 56(84) bytes of data. 64 bytes from 114.114.114.114: icmp_seq=1 ttl=84 time=9.00 ms 64 bytes from 114.114.114.114: icmp_seq=2 ttl=75 time=8.62 ms ---ping通114，ping不通baidu. ping通内网 配置dns: ubuntu@ubuntu-W760-G20:~$ 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 ubuntu@ubuntu-W760-G20:~$ cat /etc/network/interfaces # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback auto ens2f1 iface ens2f1 inet static address 192.168.205.11 netmask 255.255.255.0 gateway 192.168.205.254 ubuntu@ubuntu-W760-G20:~$ sudo nano /etc/network/interfaces 增加如下行： dns-nameservers 192.168.1.100 sudo nano /etc/resolv.conf 增加如下行： nameserver 192.168.1.100 启动interface 需要重启网卡生效； resolv.conf 不需要重启网卡就能够生效。
ubuntu@ubuntu-W760-G20:~$ ping www.baidu.com PING www.a.shifen.com (220.181.38.150) 56(84) bytes of data. 64 bytes from 220.181.38.150: icmp_seq=1 ttl=48 time=4.76 ms 64 bytes from 220.181.38.150: icmp_seq=2 ttl=48 time=26.5 ms