After you install a new machine, you may need to install some necessary packages, such as you do development, you may want to install
gcc，cmake, glibc
Like, for example, you have to do web server, you need to install apache or httpd, mysql, php and the like.
Sometimes you may have forgotten to install some dependent packages, the installation fails, we had to go to the installation dependencies.
yum it provides a very powerful, groupinstall
With this feature allows you very easy once the installation package you need,
For example, you install the necessary development kit:
yum groupinstalll "Development Tools"Remember not to lose double quotes.
If the web server is to install the necessary packages:
yum groupinstall "Web Server"If you want to know which group can use grouplist
yum grouplist
可用的环境分组：
最小安装
基础设施服务器
计算节点
文件及打印服务器
基本网页服务器
虚拟化主机
带 GUI 的服务器
GNOME 桌面
KDE Plasma Workspaces
开发及生成工作站
可用组：
传统 UNIX 兼容性
兼容性程序库
图形管理工具
安全性工具
开发工具
控制台互联网工具
智能卡支持
科学记数法支持
系统管理
系统管理工具Uninstall the specified software group
yum groupremove software group name
