Linux -- 修改IP信息

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RHE:

A、修改ip地址

即时生效:

# ifconfig eth0 192.168.0.20 netmask 255.255.255.0

启动生效:

修改/etc/sysconfig/network-s/ifcfg-eth0

B、修改default gateway

即时生效:

# route add default gw 192.168.0.254

启动生效:

修改/etc/sysconfig/network-s/ifcfg-eth0

C、修改dns

修改/etc/resolv.conf

修改后可即时生效，启动同样有效

D、修改host name

即时生效:

# hostname fc2

启动生效:

修改/etc/sysconfig/network

重新启动网络配置

/etc/init.d/network restart

[root@RH ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
BOOTPROTO=static
DEVICE=eth0
ONBOOT=yes
IPADDR=211.15.84.1
NETMASK=255.255.255.192
HWADDR=00:22:19:81:84:35
PEERDNS=no

Ubuntu

root@ubuntu:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth1
iface eth1 inet static
address 192.168.0.109
netmask 255.255.255.0
broadcast 192.168.0.255

auto eth0
iface eth0 inet static
address 211.15.84.1
netmask 255.255.255.192
gateway 211.15.84.1