X服务器的主要配置文件为 /etc/X11/xorg.conf

Section "ServerLayout"                #布局 
Identifier     "Xorg Configured"      #布局标识
Screen     0   "Default Screen" 0 0   #屏幕标识
InputDevice    "Generic Keyboard"     #键盘标识
InputDevice    "Configured Mouse"     #鼠标标识
EndSection

Section "Module"                      #模块
        Load  "ddc"  
        Load  "dbe"
        Load  "dri"
        Load  "extmod"
        Load  "glx"		
        Load  "bitmap" 
        Load  "type1"
        Load  "freetype"
        Load  "record"
EndSection

Section "Files"                       #X核心字体路径
        FontPath     "/usr/share/X11/fonts/75dpi"     
        FontPath     "/usr/share/X11/fonts/100dpi"
        FontPath     "/usr/share/X11/fonts/misc"
        FontPath     "/usr/share/X11/fonts/cyrillic"
        FontPath     "/usr/share/X11/fonts/100dpi/:unscaled"
        FontPath     "/usr/share/X11/fonts/75dpi/:unscaled"
        FontPath     "/usr/share/X11/fonts/Type1"
        FontPath     "/usr/share/fonts/Chinese/wqy-bitmapfont"
EndSection

Section "Screen"                      #屏幕
	Identifier "Default Screen"
	Device     "Card0"	      #指定显卡
        Monitor    "Monitor0"         #指定显示器
	DefaultDepth     24           #默认色深为24
	SubSection "Display"          #可用分辨率
	Depth     24		      #24位色深下可用分辨率
	Modes    "1280x1024" "1152x864" "1024x768" "800x600" "720x400" "640x480"
	………………
	EndSubSection
EndSection

Section "Device"                       #显卡
	Identifier  "Card0"
        Driver      "vesa"	       #驱动
	VendorName  "All"
	BoardName   "All"
EndSection    

/
├/ "ServerLayout"               布局
│├ "InputDevice" keyboard       键盘
│├ "InputDevice" mouse          鼠标
││
│└/ "Screen"                    显示子系统
│ ├ "Monitor"                   显示器
│ ├ "Device"  videocard         显卡
│
│
├ "Files"                        字体
└ "Module"                       模块	      

在 /etc/X11/Xsession 文件中可以发现下列内容

OPTIONFILE=/etc/X11/Xsession.options 

SYSRESOURCES=/etc/X11/Xresources 
USRRESOURCES=$HOME/.Xresources

SYSSESSIONDIR=/etc/X11/Xsession.d 
USERXSESSION=$HOME/.xsession 
ALTUSERXSESSION=$HOME/.Xsession
ERRFILE=$HOME/.xsession-errors