host file location : C:\Windows\System32\drivers\etc
application Configuration file location : http://zhidao.baidu.com/link?url=K9xpCegHfrVIZvywVPPxXcx3og3Mvd0tVN-CKpJiQojhYe-TYJwz3oJOl0_XjAEyKFob5mhY4jrRFlg4Dvi9B_
XP system in C:\Documents and Settings\[username]\Application Data under the
win7 application file in: C:\ Under Documents and Settings\[username]\AppData ; the
win7 system is divided into three subfolders:
- Small files such as configuration files are stored in the roaming folder, win7 In the system, C:\Documents and Settings\[username]\Application Data points to this folder.
- local holds non-roaming data such as registries and large files
- local low holds non-roaming data such as registry and large files
Encyclopedia of Windows system environment variables reproduced from: http://www.win8china.com/html/2218.html
| environment variable | details |
| %ALLUSERSPROFILE% | All User Profile File Locations |
| %APPDATA% | Default storage location for application data |
| %CD% | Current directory |
| %CLIENTNAME% | The NETBIOS name of the client when connecting to a Terminal Services session |
| %CMDCMDLINE% | The command line used to start the current cmd.exe |
| %CMDEXTVERSION% | The current command handler extension version number |
| %CommonProgramFiles% | Folder path for frequently used files |
| %COMPUTERNAME% | Computer name |
| %COMSPEC% | Path to executable command shell (command handler) |
| %DATE% | current date |
| %ERRORLEVEL% | Error code for the most recently used command |
| %HOMEDRIVE% | The drive letter where the user's home directory is located |
| %HOMEPATH% | The full path to the user's home directory |
| %HOMESHARE% | The network path to the user's shared home directory |
| %LOGONSEVER% | A valid domain name controller name for the current login session |
| %NUMBER_OF_PROCESSORS% | The number of processors installed in the computer |
| %YOU% | The name of the operating system (Windows XP and Windows 2000 are listed as Windows_NT) |
| %Path% | Executable search path |
| %PATHEXT% | File extensions that the operating system considers executable |
| %PROCESSOR_ARCHITECTURE% | processor chip architecture |
| %PROCESSOR_IDENTIFIER% | Description of the processor |
| %PROCESSOR_LEVEL% | The model of the computer's processor |
| %PROCESSOR_REVISION% | The revision number of the processor |
| %ProgramFiles% | Path to the Program Files folder |
| %PROMPT% | Command prompt settings for the current command interpreter |
| %RANDOM% | random decimal number between 0 and 32767 |
| %SESSIONNAME% | Connection and session name when connecting to a Terminal Services session |
| %SYSTEMDRIVE% | The drive where the Windows startup directory is located |
| %SYSTEMROOT% | The location of the Windows startup directory |
| %TEMP% and %TMP% | Default temporary directory for applications available to the currently logged in user |
| %TIME% | current time |
| %USERDOMAIN% | 包含用户帐号的域的名字 |
| %USERNAME% | 当前登录的用户的名字 |
| %USERPROFILE% | 当前用户 Profile 文件位置 |
| %WINDIR% | 操作系统目录的位置 |