NTOP设置时出现“Please enable make sure that the ntop html/ directory is properly installed”

Error 400
The specified request is invalid.
Received request:

“GET / HTTP/1.1″

提示错误，多半是权限问题，可采用以下方法解决：
＃sudo chown -R ntop:ntop  /var/lib/ntop/           \\**改变owner**\
＃sudo chown -R ntop:ntop  /usr/share/ntop/
＃sudo ln -s /usr/share/ntop/html  /var/lib/ntop/     \\*建立一个符号链接*\\
＃sudo  /etc/init.d/ntop restart                                  重启服务以便设置生效