http://dag.wiee.rs/home-made/dstat/#download
https://github.com/dagwieers/dstat
http://lhflinux.blog.51cto.com/1961662/518868
http://blog.csdn.net/chen_jp/article/details/8966054
http://www.cnblogs.com/vincent-hv/p/3358194.html
http://blog.yufeng.info/archives/1239
http://www.ha97.com/1037.html