查看ubuntu 14.04的网关和DNS

root@ubuntu:~# nm-tool

NetworkManager Tool

State: connected (global)

- Device: eth0  [自动以太网] ----------------------------------------------
Type:              Wired
Driver:            e1000
State:             connected
Default:           yes
HW Address:        00:0C:29:3D:B3:0A

Capabilities:
Carrier Detect:  yes
Speed:           1000 Mb/s

Wired Properties
Carrier:         on

IPv4 Settings:
Address:         10.111.131.66
Prefix:          24 (255.255.255.0)
Gateway:         10.111.131.1

DNS:             172.16.202.5