1:clear
2:Ctrl+L
3:printf "\033c"
4:ALT+F8
By KillerLegend
Ref:http://www.coolcoder.in/2014/01/how-to-clear-terminal-screen-for-real.html
Linux清屏命令,布布扣,bubuko.com
Linux清屏命令
原文：http://www.cnblogs.com/killerlegend/p/3905794.html
