Linux--ifcfg-eth0与ifcfg-eth0.bak

1.进入/etc/sysconfig/network-scripts/

[root@testdb ~]# cd /etc/sysconfig/network-scripts/

[root@testdb network-scripts]# ls

ifcfg-eth0      ifdown-post    ifup-ippp    ifup-sit

ifcfg-eth0.bak  ifdown-ppp     ifup-ipsec   ifup-sl

ifcfg-lo        ifdown-routes  ifup-ipv6    ifup-tunnel

ifdown          ifdown-sit     ifup-ipx     ifup-wireless

ifdown-bnep     ifdown-sl      ifup-isdn    init.ipv6-global

ifdown-eth      ifdown-tunnel  ifup-plip    net.hotplug

ifdown-ippp     ifup           ifup-plusb   network-functions

ifdown-ipsec    ifup-aliases   ifup-post    network-functions-ipv6

ifdown-ipv6     ifup-bnep      ifup-ppp

ifdown-isdn     ifup-eth       ifup-routes
2.停止network

[root@testdb network-scripts]# service network stop 
3.删除多余ifcfg-eth0.bak

[root@testdb network-scripts]# rm -rf ifcfg-eth0.bak

[root@testdb network-scripts]# ls

ifcfg-eth0    ifdown-isdn    ifup-aliases  ifup-plip    ifup-wireless

ifcfg-lo      ifdown-post    ifup-bnep     ifup-plusb   init.ipv6-global

ifdown        ifdown-ppp     ifup-eth      ifup-post    net.hotplug

ifdown-bnep   ifdown-routes  ifup-ippp     ifup-ppp     network-functions

ifdown-eth    ifdown-sit     ifup-ipsec    ifup-routes  network-functions-ipv6

ifdown-ippp   ifdown-sl      ifup-ipv6     ifup-sit

ifdown-ipsec  ifdown-tunnel  ifup-ipx      ifup-sl

ifdown-ipv6   ifup           ifup-isdn     ifup-tunnel
4.配置ifcfg-eth0(静态ip,非dhcp)

[root@testdb network-scripts]# vi ifcfg-eth0

# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)

DEVICE=eth0

BOOTPROTO=none

ONBOOT=yes

HWADDR=00:0c:29:6c:fc:19

NETMASK=255.255.255.0

IPADDR=192.168.1.131

GATEWAY=192.168.1.1

TYPE=Ethernet

USERCTL=no

IPV6INIT=no

PEERDNS=yes
5.network开启

[root@testdb network-scripts]# service network start

---------------------------------------

DEVICE=物理设备名

IPADDR=IP地址

NETMASK=掩码值

NETWORK=网络地址

BROADCAST=广播地址

GATEWAY=网关地址

ONBOOT=[yes|no]（引导时是否激活设备）

USERCTL=[yes|no]（非root用户是否可以控制该设备）

BOOTPROTO=[none|static|bootp|dhcp]（引导时不使用协议|静态分配|BOOTP协议|DHCP协议）

HWADDR = 你的MAC地址