Linux下网络设定

1. /etc/sysconfig/network-scripts/ 下有配置文件：

比如文件：ifcfg-eth0 代表是以太网实际网卡0的配置文件。

2. 域名服务器配置文件：

/resolv.conf

3. 实例说明（启动生效也可以通过“service network restart”使其生效）：

• 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-scripts/ifcfg-eth0
  
• 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-scripts/ifcfg-eth0
  
• 修改dns
  修改/etc/resolv.conf
  修改后可即时生效，启动同样有效
  
• 修改host name
  即时生效:
  # hostname fc2
  启动生效:
  修改/etc/sysconfig/network及/etc/hosts

4. /etc/sysconfig/network

NETWORKING=yes
HOSTNAME=FOOLRHAS42
GATEWAY=192.168.101.252

5. /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 FOOLRHAS42.localdomain FOOLRHAS42

6. /etc/resolv.conf

nameserver 202.96.209.5

7. /etc/sysconfig/network-scripts/ifcfg-eth0

# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.101.222
NETMASK=255.255.255.0
GATEWAY=192.168.101.252
HWADDR=00:0C:29:AA:37:0C