Oracle 管理之 Linux 网络基础
1、TCP/IP 网络配置文件2、使用命令配置网络3、网络诊断工具 TCP/IP 网络配置文件IP配置文件：/etc/sysconfig/network-scripts/i
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Oracle 管理之 Linux 网络基础
[日期：2013-02-16] 来源：blog.csdn.net/xiangsir 作者：xiangsir [字体：]
1、TCP/IP 网络配置文件
2、使用命令配置网络
3、网络诊断工具
TCP/IP 网络配置文件
IP配置文件：/etc/sysconfig/network-scripts/ifcfg-eth0
网管配置文件：/etc/sysconfig/network
域名解析：/etc/host.conf
主机配置：/etc/hosts
路由配置：/etc/resolv.conf
服务端口配置：/etc/services
网络接口启动脚本：
[root@asm ~]# more /etc/sysconfig/network-scripts/ifcfg-eth0
# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.8.255
HWADDR=00:0C:29:8B:86:65
IPADDR=192.168.8.160
NETMASK=255.255.255.0
NETWORK=192.168.8.0
ONBOOT=yes
[root@asm ~]# more /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=asm.Oracle.com
GATEWAY=192.168.8.1
/etc/hosts
该文件是系统本地的主机名称解析数据库
[root@asm ~]# more /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
192.168.8.160 asm.oracle.com asm
/etc/host.conf 文件用于指定如何解析主机名，可用选项：
order:设置主机名解析的可用方法及顺序，可用方法包括hosts（使用/etc/hosts文件进行解析）、bind
（使用DNS服务器解析）、nis（使用网络信息服务NIS解析）
multi：设置是否从 /etc/hosts 文件中返回主机的多个 IP 地址，取值为 on/off
/etc/resolv.conf 文件是 DNS (DNS域名服务的客户端配置文件)：
[root@asm ~]# more /etc/resolv.conf
nameserver 192.168.8.11
search oracle.com
domain oracle.com
/etc/services 设置网络服务默认使用的 TCP 或 UDP 端口
使用命令行工具或GUI工具配置 Linux 网络：
[root@asm ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:8B:86:65
inet addr:192.168.8.160 Bcast:192.168.8.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23894 errors:0 dropped:0 overruns:0 frame:0
TX packets:1864 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1708719 (1.6 MiB) TX bytes:309503 (302.2 KiB)
Interrupt:75 Base address:0x2000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:18747 errors:0 dropped:0 overruns:0 frame:0
TX packets:18747 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1215290 (1.1 MiB) TX bytes:1215290 (1.1 MiB)
[root@asm ~]# ifconfig eth0 192.168.8.161 netnask 255.255.255.0 up
[root@asm ~]# ifconfig eth0 192.168.8.160 netnask 255.255.255.0 up
[root@asm ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:8B:86:65
inet addr:192.168.8.160 Bcast:192.168.8.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:24260 errors:0 dropped:0 overruns:0 frame:0
TX packets:2001 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1736070 (1.6 MiB) TX bytes:327830 (320.1 KiB)
Interrupt:75 Base address:0x2000
修改配置文件重启网卡也可修改IP地址：
vi /etc/sysconfig/network-scripts/ifcfg-eth0
service network restart
vi /etc/sysconfig/network
vi /etc/resolv.conf
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