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


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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