如何使用AWK或Sed在x个单词之后插入换行符\n

Question

我在一行中有这个:

We were born in the earth beyond the land

我希望它在3个单词行中,如下所示:

We were born
in the earth 
beyond the land

Answer 1

$ xargs -n3 < file
We were born
in the earth
beyond the land

$ egrep -o '\S+\s+\S+\s+\S+' file 
We were born
in the earth
beyond the land