Linux下设置IP、网关、掩码、MAC和DNS

先用ifconfig来查看所有活动网络接口

eth0      Link encap:Ethernet  HWaddr b8:27:eb:1b:63:a8
		inet addr:192.168.1.6  Bcast:192.168.1.255  Mask:255.255.255.0
		inet6 addr: fe80::6502:67ff:89b:b2fd/64 Scope:Link
		UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
		RX packets:43239 errors:0 dropped:24 overruns:0 frame:0
		TX packets:30644 errors:0 dropped:0 overruns:0 carrier:0
		collisions:0 txqueuelen:1000
		RX bytes:25068614 (23.9 MiB)  TX bytes:5993030 (5.7 MiB)

lo        Link encap:Local Loopback
		inet addr:127.0.0.1  Mask:255.0.0.0
		inet6 addr: ::1/128 Scope:Host
		UP LOOPBACK RUNNING  MTU:65536  Metric:1
		RX packets:1961 errors:0 dropped:0 overruns:0 frame:0
		TX packets:1961 errors:0 dropped:0 overruns:0 carrier:0
		collisions:0 txqueuelen:1
		RX bytes:160232 (156.4 KiB)  TX bytes:160232 (156.4 KiB)

设置IP和掩码 Link to heading

ifconfig eth0 192.168.1.6 netmask 255.255.255.0 

设置网关 Link to heading

route add default gw 192.168.1.1

修改网卡MAC Link to heading

ifconfig eth0 down
ifconfig eth0 hw ether b877c322f8
ifconfig eth0 up

设置DNS Link to heading

vi /etc/resolv.conf

nameserver 114.114.114.114
nameserver 114.114.115.115

重启网络服务生效 service network restart

最新的ubuntu已经不能简单通过修改/etc/resolv.conf来实现，需要修改resolvconf配置文件，然后通过命令resolvconf命令来操作

修改/etc/resolvconf/resolv.conf/目录下的head文件

nameserver 114.114.114.114

然后通过更新配置来生效

resolvconf -u