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Centos默认自带VI，功能没VIM丰富，安装VIM取代VI。
用Yum查找源中的VIM包，不知安装哪个合适。

yum search vim
vim-X11.i386 : The VIM version of the vi editor for the X Window System.
vim-common.i386 : The common files needed by any version of the VIM editor.
vim-enhanced.i386 : A version of the VIM editor which includes recent enhancements.
vim-minimal.i386 : A minimal version of the VIM editor.

到已安装VIM的系统中查看VIM属于哪个软件包：

which vim
/usr/bin/vim
rpm -qf /usr/bin/vim
vim-enhanced-7.0.109-7.el5

安装VIM：

yum install vim-enhanced

CentOS包管理rpm常用命令，查询未安装软件时加参数p：

#https://www.haiyun.me
rpm -qa #列出系统当前安装的软件
rmm -qa pkg #查询系统是否已安装特定软件
rpm -qf /path/file #查询特定文件属于哪个软件
rpm -ql pkg #列出软件所包含的文件
rpm -qi pkg #查询已安装软件的详细信息
rpm -qR pkg #查询已安装软件的依赖关系
rpm -qd pkg #查询已安装软件的文档目录
rpm -ivh pkg #安装软件
rpm -Uvh pkg #更新软件
rpm -e pkg #删除软件

yum常用命令：

yum install pkg #安装软件
yum remove pkg #删除软件
yum check-update #检查更新
yum update #更新
yum clean all #清除所有缓存
yum search pkg #搜索软件
yum deplist pkg #查看依赖关系

Centos官方源很多软件都没有，编译安装又比较麻烦，可以安装EPEL源解决此问题。
EPEL即Extra Packages for Enterprise Linux，也就是为企业级 Linux提供的扩展软件源，适用于 RHEL，CentOS，Scientific Linux系统。
Centos5安装

rpm -ivh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
rpm -ivh http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm

centos6安装

rpm -ivh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

Centos7安装：

rpm -ivh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm

国内访问修改为sohu提供的镜像：

cat > /etc/yum.repos.d/epel.repo <<EOF
[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
baseurl=http://mirrors.sohu.com/fedora-epel/6/$basearch
#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

[epel-debuginfo]
name=Extra Packages for Enterprise Linux 6 - $basearch - Debug
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch/debug
baseurl=http://mirrors.sohu.com/fedora-epel/6/$basearch/debug
#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-6&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
gpgcheck=1

[epel-source]
name=Extra Packages for Enterprise Linux 6 - $basearch - Source
#baseurl=http://download.fedoraproject.org/pub/epel/6/SRPMS
baseurl=http://mirrors.sohu.com/fedora-epel/6/SRPMS
#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-source-6&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
gpgcheck=1
EOF

安装Apache：

yum -y install httpd

安装Mysql：

yum -y install mysql-server
/etc/init.d/mysqld start

设置Mysql密码

/usr/bin/mysqladmin -u root password 'newpassowrd'

安装PHP：

yum -y install php php-mysql
/etc/init.d/httpd start

设置开机启动

chkconfig httpd on
chkconfig mysqld on

Centos的yum软件库没有Debian的多，很多软件都要自己编译安装，可以试试下面这个第三方yum，很多常用软件都可以直接Yum安装了。

wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.i386.rpm
rpm -ivh rpmforge-release-0.5.2-2.el5.rf.i386.rpm