During system installation with Anaconda and when managing packages using the Browse mode of Pirut (which appears on the menu as >Applications>Add/Remove Software and identifies itself as Package Manager in its window title), you are given the option of selecting packages by groups arranged into broad categories. Each group may contain mandatory and optional packages, and optional packages in each group may be included or excluded for installation by default. Some packages are not included in any category and cannot be installed through this hierarchy.

The package taxonomy is created by the comps XML files, which are found in /var/cache/yum/*/comps*.xml -- each repository may have its own comps file. These files use an XML format which looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE comps PUBLIC "-//Red Hat, Inc.//DTD Comps info//EN" "comps.dtd">
<comps xmlns="">

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Anaconda ：Linux 系统安装程序

使用 Anaconda PXE 安装操作系统。
可在 pxelinux.cfg/* 配置文件中写入如下这些命令行参数，来控制 anaconda 执行安装过程的行为。

Boot time command args:
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expert          Turns on special features:

Rebuild your own rpms