Linux的网络相关配置记录在了很多文件中，记录一下。

查看网卡是否被内核识别：

[root@linux ~]# dmesg|grep -in eth
150:divert: not allocating divert_blk for non-ethernet device lo
239:divert: allocating divert_blk for eth0
240:e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
366:divert: not allocating divert_blk for non-ethernet device sit0
389:ADDRCONF(NETDEV_UP): eth0: link is not ready
390:e1000: eth0: e1000_watchdog_task: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
391:ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
394:eth0: no IPv6 routers present

主机名称：

[root@linux ~]# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=linux.banping.com

网卡参数：

[root@linux ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=none
BROADCAST=172.16.0.255
HWADDR=00:50:56:82:2F:49
IPADDR=172.16.0.157
NETMASK=255.255.255.0
NETWORK=172.16.0.0
ONBOOT=yes
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes
GATEWAY=172.16.0.254

开机加载网卡模块：

[root@linux ~]# cat /etc/modprobe.conf
alias eth0 e1000
alias scsi_hostadapter mptbase
alias scsi_hostadapter1 mptscsi
alias scsi_hostadapter2 mptspi
alias scsi_hostadapter3 mptsas
alias scsi_hostadapter4 mptscsih
alias scsi_hostadapter5 ata_piix

DNS服务器：

[root@linux ~]# cat /etc/resolv.conf
search banping.com
nameserver 172.16.0.1
nameserver 172.16.0.3
nameserver 172.16.0.5

IP与主机对应：

[root@linux ~]# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
172.16.0.157    linux.banping.com      localhost

TCP/IP协议与端口的对应

[root@linux ~]# cat /etc/services

重启所有网络参数：

[root@linux ~]# /etc/init.d/network restart
Shutting down interface eth0:  [  OK  ]
Shutting down loopback interface:  [  OK  ]
Setting network parameters:  [  OK  ]
Bringing up loopback interface:  [  OK  ]
Bringing up interface eth0:  [  OK  ]

启用网卡：

[root@linux ~]# ifup eth0

停用网卡（慎用，否则可能导致你再也连不上了）：

[root@linux ~]# ifdown eth0

测试网卡：

[root@linux ~]# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:50:56:82:2F:49
inet addr:172.16.0.157  Bcast:172.16.0.255  Mask:255.255.255.0
inet6 addr: fe80::250:56ff:fe82:2f49/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:506414 errors:0 dropped:0 overruns:0 frame:0
TX packets:1691 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:140448492 (133.9 MiB)  TX bytes:200009 (195.3 KiB)

设置IP地址：

[root@linux ~]# ifconfig eth0 172.16.0.157