国内常用NTP服务器地址及IP
http://www.douban.com/note/171309770/
Discuz!建站教程
http://www.zb7.com/discuz/
Permanently added (RSA)
http://www.cnblogs.com/itcomputer/p/4838548.html
ip访问次数
http://blog.itpub.net/28916011/viewspace-1420284/
linux下查看iowait的进程
http://blog.sina.com.cn/s/blog_5d3855450100mons.html
