用U盤安裝 CentOS 6.4 + Windows 7雙系統 （Win 7下安裝 CentOs 6.4) （安裝見本文下面的連接），但是有了系統怎麼可以不聯網，太痛苦了！
這一篇是 CentOS 6.4 電信ADSL 撥號連接的配置，親測
參考：CentOS 6.4 電信寬帶鏈接網絡配置 http://www.linuxidc.com/Linux/2013-04/83206.htm
1.下載 rp-pppoe-3.8.tar.gz
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免費下載地址在 http://linux.linuxidc.com/
用戶名與密碼都是www.linuxidc.com
具體下載目錄在 /2015年資料/1月/11日/CentOS 6.4 電信ADSL撥號上網網絡配置
下載方法見 http://www.linuxidc.com/Linux/2013-07/87684.htm
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2.安裝 rp-pppoe（對文件所在文件夾右鍵在終端打開）
解壓 rp-pppoe-3.8.tar.gz ：
#tar -zxf rp-pppoe-3.8.tar.gz
進入生成的目錄：
#cd rp-pppoe-3.8
在所在目錄內運行腳本 go：
#./go
將自動進行編譯和安裝
3、網絡配置 （紅色為輸入，藍色為注釋）
[root@Cheng liaojch3]# pppoe-setup (輸入 pppoe-setup )
Welcome to the Roaring Penguin PPPoE client setup.
First, I will run some checks on your system to make sure the PPPoE client is installed properly...
Looks good!
Now, please enter some information:
USER NAME
>>> Enter your PPPoE user name (default cz743720): cz743720 （輸入上網賬號)
INTERFACE
>>> Enter the Ethernet interface connected to the DSL modem
For Solaris, this is likely to be something like /dev/hme0.
For Linux, it will be ethn, where 'n' is a number.
(default eth0): eth0 （選擇你的網卡，默認為 eth0）
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): no （這裡填 no 或 直接回車）
DNS
Please enter the IP address of your ISP's primary DNS server.
If your ISP claims that 'the server will provide 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: 202.96.128.86 （輸入首選 DNS 地址，這個很重要，我一開始看網上是填 sever 表示自動獲取DNS，但沒有成功， 後來我查了自己所在城市DNS地址，這裡是廣東“其他地區”的首選DNS，建議百度自己的DNS地址）
Please enter the IP address of your ISP's secondary DNS server.
If you just press enter, I will assume there is only one DNS server.
>>> Enter the secondary DNS server address here: 202.96.128.143 （備用 DNS 地址，同樣查一下）
PASSWORD
>>> Please enter your PPPoE password: （輸入密碼）
>>> Please re-enter your PPPoE password: （再次輸入密碼）
FIREWALLING
Please choose the firewall rules to use.
Note that these rules are very basic.
You are strongly encouraged to use a more sophisticated firewall setup; however, these will provide basic security.
If you are running any servers on your machine, you must choose 'NONE' and set up firewalling yourself.
Otherwise, the firewall rules will deny access to all standard servers like Web, e-mail, ftp, etc.
If you are using SSH, the rules will block outgoing SSH connections which allocate a privileged source port.
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 （選擇防火牆，0表示不開啟防火牆）
** Summary of what you entered **
Ethernet
Interface: eth0
User name: cz743720
Activate-on-demand: No
Primary DNS:202.96.128.86
Secondary DNS:202.96.128.143
Firewalling:NONE
>>> Accept these settings and adjust configuration files (y/n)? y （填 y 確認）
Adjusting /etc/ppp/pppoe.conf
Adjusting /etc/resolv.conf (But first backing it up to /etc/resolv.conf-bak)
Adjusting /etc/ppp/pap-secrets and /etc/ppp/chap-secrets (But first backing it up to /etc/ppp/pap-secrets-bak) (But first backing it up to /etc/ppp/chap-secrets-bak)
Congratulations, it should be all set up!
Type 'pppoe-start' to bring up your PPPoE link and 'pppoe-stop' to bring
it down. Type 'pppoe-status' to see the link status.
[root@Cheng liaojch3]# pppoe-start （ 用 pppoe-start 進行連接）
. Connected! (連接成功，你可以用 ping www.linuxidc.com 進行測試一下）
4、上網命令（用 root 權限）
撥號上網 pppoe-start
斷開上網 pppoe-stop
查看狀態 pppoe-status
VMware虛擬機下安裝CentOS7.0圖文教程 http://www.linuxidc.com/Linux/2014-10/108013.htm
U盤安裝64位CentOS 6.5方法 http://www.linuxidc.com/Linux/2014-04/100035.htm
Win7安裝64位CentOS 6.4雙系統詳細圖文教程 http://www.linuxidc.com/Linux/2014-04/100032.htm
CentOS與Windows雙系統安裝注意事項記錄 http://www.linuxidc.com/Linux/2014-05/101571.htm
UEFI+GPT安裝Windows8和CentOS雙系統 http://www.linuxidc.com/Linux/2014-05/101575.htm
Windows8.1和CentOS6.5雙系統安裝 http://www.linuxidc.com/Linux/2014-05/101581.htm
CentOS 5.6 Linux安裝系統後的基本優化 http://www.linuxidc.com/Linux/2012-02/54504.htm
更多CentOS相關信息見CentOS 專題頁面 http://www.linuxidc.com/topicnews.aspx?tid=14
