内容提要
运行 Setup Agent
当安装系统结束，取出安装DVD，重新启动系统，首先进入如下的 GRUB 界面。
GRUB 启动界面
引导Linux系统后，经过一系列的启动过程，将运行如下图所示的 Setup Agent 界面。
Setup Agent
配置防火墙
在 Setup Agent 界面中选 Firewall Configuration，后按Run Tool，进入如下配置界面。
配置防火墙
选择禁用防火墙和selinux，之后选 OK。
添加一个普通用户账号
使用如下命令添加一个普通用户账号并设置其口令
# useradd osmond
# passwd osmond
Changing password for user osmond.
New UNIX password:
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
#
使用更新源的国内镜像
当 CentOS 安装完毕，首先应该修改更新源，并升级到最新的系统。
国内速度较快的常用更新源：
http://mirror.be10.com/centos/
http://centos.candishosting.com.cn/
http://ftp.sjtu.edu.cn/centos/
http://ftp.hostrino.com/pub/centos/
http://mirrors.ta139.com/centos/
http://ftp.iasi.roedu.net/mirrors/centos.org/centos/
首先编辑 yum 的配置文件
# vi /etc/yum.repos.d/CentOS-Base.repo
| [base] name=CentOS-$releasever - Base #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/ baseurl=http://centos.candishosting.com.cn/$releasever/os/$basearch/ http://mirrors.ta139.com/centos/$releasever/os/$basearch/ http://mirror.be10.com/centos/$releasever/os/$basearch/ http://ftp.sjtu.edu.cn/centos/$releasever/os/$basearch/ http://ftp.hostrino.com/pub/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5 #released updates [updates] name=CentOS-$releasever - Updates #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates #baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/ baseurl=http://centos.candishosting.com.cn/$releasever/updates/$basearch/ http://mirrors.ta139.com/centos/$releasever/updates/$basearch/ http://mirror.be10.com/centos/$releasever/updates/$basearch/ http://ftp.sjtu.edu.cn/centos/$releasever/updates/$basearch/ http://ftp.hostrino.com/pub/centos/$releasever/updates/$basearch/ gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5 #packages used/produced in the build but not released [addons] name=CentOS-$releasever - Addons #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons #baseurl=http://mirror.centos.org/centos/$releasever/addons/$basearch/ baseurl=http://centos.candishosting.com.cn/$releasever/addons/$basearch/ http://mirrors.ta139.com/centos/$releasever/addons/$basearch/ http://mirror.be10.com/centos/$releasever/addons/$basearch/ http://ftp.sjtu.edu.cn/centos/$releasever/addons/$basearch/ http://ftp.hostrino.com/pub/centos/$releasever/addons/$basearch/ gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5 #additional packages that may be useful [extras] name=CentOS-$releasever - Extras #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras #baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/ baseurl=http://centos.candishosting.com.cn/$releasever/extras/$basearch/ http://mirrors.ta139.com/centos/$releasever/extras/$basearch/ http://mirror.be10.com/centos/$releasever/extras/$basearch/ http://ftp.sjtu.edu.cn/centos/$releasever/extras/$basearch/ http://ftp.hostrino.com/pub/centos/$releasever/extras/$basearch/ gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-$releasever - Plus #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus #baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/ baseurl=http://centos.candishosting.com.cn/$releasever/centosplus/$basearch/ http://mirrors.ta139.com/centos/$releasever/centosplus/$basearch/ http://mirror.be10.com/centos/$releasever/centosplus/$basearch/ http://ftp.sjtu.edu.cn/centos/$releasever/centosplus/$basearch/ http://ftp.hostrino.com/pub/centos/$releasever/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5 #contrib - packages by Centos Users [contrib] name=CentOS-$releasever - Contrib #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib #baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/ baseurl=http://centos.candishosting.com.cn/$releasever/contrib/$basearch/ http://mirrors.ta139.com/centos/$releasever/contrib/$basearch/ http://mirror.be10.com/centos/$releasever/contrib/$basearch/ http://ftp.sjtu.edu.cn/centos/$releasever/contrib/$basearch/ http://ftp.hostrino.com/pub/centos/$releasever/contrib/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5 |
然后使用如下命令更新到最新系统：
# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY* # yum upgrade 安装必要的软件包
安装必要的软件工具
# yum install wget bzip2 unzip zip nmap tree lynx fileutils ncftp lftp 若您需要在本机编译源代码的软件，请安装开发工具组的软件包
# yum groupinstall "Development Tools"
