1、Windows NT/2000/XP/Vista/win7（即微软NT系列操作系统）：
默认位置为 %SystemRoot%\system32\drivers\etc\，但也可以改变。
典型的XP系统hosts文件位置：C:\windows\system32\drivers\etc
2、Windows 95/98/Me：%WinDir%\
3、Linux及其他类Unix操作系统：/etc
4、苹果系：
Mac OS 9及更早的系统：System Folder: Preferences或System folder（文件格式可能与Windows和Linux所对应的文件不同）
Mac OS X：/private/etc（使用BSD风格的hosts文件）
5、iPhone OS：/etc
6、iPad OS：/private/etc
7、Symbian第1/2版手机：C:\system\data\hosts
8、Symbian第3版手机：C:\private\10000882\hosts，只能使用兼容AllFiles的文件浏览器访问，大部分都不行。
1、 用记事本打开hosts文件，就可以看见了微软对这个文件的说明。Hosts文件文一般有如下面的基本内容
# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
127.0.0.1 localhost
