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Linux 核心是 2.6 以上的就會自動載入 SELinux，但因為才剛開始玩 CentOS 對它還不熟為了減少挫折就先關了吧，等以後熟點再說，關於 SELinux 是什可以參考這三篇詳細的說明。[鳥哥的 Linux 私房菜 -- 認識網路安全 SELinux]、[SELinux - Wikipedia]、[SELinux 設定範例]

 #vi /etc/sysconfig/selinux
 SELINUX=enforcing                            //預設值 (阻擋不安全的有取行為)
 SELINUX=disabled                             //修改後 (關閉 SELinux 功能)

如何查看目前系統的 SELinux 狀態？

 #sestatus
 SELinux status:                 enabled      //可知是有啟用的
 SELinuxfs mount:                /selinux
 Current mode:                   permissive
 Mode from config file:          disabled
 Policy version:                 21
 Policy from config file:        targeted

以下訊息可知目前系統完全關閉 SELinux 功能

Yum (Yellow dog Updater, Modified) 為 Fedora 及 CentOS 用來管理 RPM 安裝，可解決套件相依性問題。
詳細內容可參考[Yellow Dog Updater Modified - Wikipedia]

1. 調整時區
rm /etc/localtime

Configuring the Softflowd NetFlow Exporter

Softflowd is a software-only NetFlow exporter. You can use it to gather NetFlow traffic statistics if you don't have NetFlow-compatible routers or switches. Softflowd listens to traffic on an interface, and exports NetFlow v5 & v9 flow records to a program like InterMapper Flows.

Softflowd is open source software available from http://www.mindrot.org/projects/softflowd/. It runs on Linux, FreeBSD, and Mac OS X, but you must have a compiler and development environment to compile it from the source code. If you wish to run a software exporter on Windows, you should take a look at nProbe.

加入 RPMForge 來源
1. 匯入 rpmforge GPG Key

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