Debian9修改默认IP,网关

1. vim /etc/network/interfaces
2. 修改成如下

# 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/*

# The loopback network interface 
auto lo 
auto eth0 
 
iface lo inet loopback 
allow-hotplug eth0 
iface eth0 inet static 
address 192.168.1.7 
netmask 255.255.255.0 
gateway 192.168.1.8
                                                                         

3. 重启系统sudo reboot

图形界面左上application→setting→network connections,删掉除了eth0以外的其他网卡,这时图形界面右上角会显示disconnect,鼠标点上去,可以选择auto ethernet,这个时候就可以用自己的设置上网了.