localhost无法访问

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服务器上运行了一个web项目，我用本机可以访问。http://172.16.12.81:8080/myweb ,但是通过服务器本身访问 http://localhost:8080/myweb 或者 http://127.0.0.1:8080/myweb 访问不了。

cmd ping localhsot 拼不通

在ping 127.0.0.1也拼不通

ping www.baidu.com ok

郁闷了。

最后发现是host文件的原因

记事本打开

C:\WINDOWS\system32\drivers\etc\host

发现里面的文件少了最后三行：

# localhost name resolution is handled within DNS itself.
# 127.0.0.1 localhost
# ::1 localhost

# Copyright (c) 1993-2009 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

# localhost name resolution is handled within DNS itself.
# 127.0.0.1       localhost
# ::1             localhost

再遇到此类问题还会继续完善