Linux下为机器设置静态IP地址：
vim /etc/sysconfig/network-scripts/ifcfg-eth0
修改这个文件内容如下形式：
# Intel Corporation 82541GI Gigabit Ethernet Controller
DEVICE=eth0
BOOTPROTO=static #为静态的
HWADDR=00:15:17:B2:DC:B5
ONBOOT=yes
IPADDR=10.20.134.199 #这个是设置的静态IP地址
NETMASK=255.255.254.0
GATEWAY=10.20.134.1 #网关
修改后，需要重启网络是更改生效：/etc/init.d/network restart，自动获取动态IP地址方式：
vim /etc/sysconfig/network-scripts/ifcfg-eth1
内容如下：
# Intel Corporation 82566DM-2 Gigabit Network Connection
DEVICE=eth1
BOOTPROTO=dhcp #动态获取IP
HWADDR=00:15:17:B2:DC:B7
ONBOOT=no
运行命令：dhclient eth1 ，自动获取动态IP地址，可以通过：ifconfig查看分配的IP地址。
vim /etc/resolv.conf
用于定义如下四项
nameserver #定义DNS服务器的IP地址，这个最为重要
domain #定义本地域名
search #定义域名的搜索列表
sortlist #对返回的域名进行排序
设置PPPOE拨号接入：
pppoe就是ADSL上网的一个封装协议，实现ADSL上网拨号用的。默认情况下已经安装了，可以查询确认一下。
1. 确认安装rp-pppoe ->rpm -q rp-pppoe
rp-pppoe-3.5-2
your system to make sure the PPPoE client is installed properly...
LOGIN NAME
#请输入adsl帐户名：
Enter your Login Name (default root):gzdsl123456789
INTERFACE
#哪一块网卡连接的是adsl moden：
Enter the Ethernet interface connected to the ADSL modem
For Solaris, this is likely to be something like /dev/hme0.
For Linux, it will be ethX, where 'X' is a number.
(default eth0): eth1
#是否需要按需拨号：对包年包月缺省no
Do you want the link to come up on demand, or stay up continuously?
If you want it to come up on demand, enter the idle time in seconds
after which the link should be dropped. If you want the link to
stay up permanently, enter 'no' (two letters, lower-case.)
NOTE: Demand-activated links do not interact well with dynamic IP
addresses. You may have some problems with demand-activated links.
Enter the demand value (default no):
#输入server自动获取dns服务器IP
DNS
Please enter the IP address of your ISP's primary DNS server.
If your ISP claims that 'the server will provide dynamic DNS addresses',
enter 'server' (all lower-case) here.
If you just press enter, I will assume you know what you are
doing and not modify your DNS setup.
Enter the DNS information here:server
PASSWORD
#输入adsl帐户密码
Please enter your Password:xxxxxxx
Please re-enter your Password:
USERCTRL
#是否允许一般用户断开adsl连接，可以输入NO
Please enter 'yes' (two letters, lower-case.) if you want to allow
normal user to start or stop DSL connection (default yes):yes
#选择防火墙的类型，0为无防火墙
The firewall choices are:
0 - NONE: This script will not set any firewall rules. You are responsible
for ensuring the security of your machine. You are STRONGLY
recommended to use some kind of firewall rules.
1 - STANDALONE: Appropriate for a basic stand-alone web-surfing workstation
2 - MASQUERADE: Appropriate for a machine acting as an Internet gateway
for a LAN
Choose a type of firewall (0-2):0
Start this connection at boot time
#系统启动时，是否自动进行拨号，为了调试方便，选NO
Do you want to start this connection at boot time?
Please enter no or yes (default no):no
** Summary of what you entered **
#确认无误后，自动生成配置文件。
Ethernet Interface: eth1
User name: gzdsl123456789
Activate-on-demand: No
DNS addresses: Supplied by ISP's server
Firewalling: NONE
User Control: yes
Accept these settings and adjust configuration files (y/n)?y
#adsl配置文件如下
Adjusting /etc/sysconfig/network-scripts/ifcfg-ppp0
Adjusting /etc/ppp/chap-secrets and /etc/ppp/pap-secrets
(But first backing it up to /etc/ppp/chap-secrets.bak)
(But first backing it up to /etc/ppp/pap-secrets.bak)
Congratulations, it should be all set up!
Type '/sbin/ifup ppp0' to bring up your xDSL link and '/sbin/ifdown ppp0'
to bring it down.
Type '/sbin/adsl-status /etc/sysconfig/network-scripts/ifcfg-ppp0'
to see the link status.
adsl脚本控制
adsl拨号
adsl-start
显示adsl连接状态
adsl-status
断开adsl连接
adsl-stop