在正常模式下：
原文链接：https://www.f2er.com/bash/388319.htmlG100kdgg
换一种说法：
G -> go to last line 100k -> go up 100 lines dgg -> delete to top of file
G100kdgg
换一种说法：
G -> go to last line 100k -> go up 100 lines dgg -> delete to top of file
