如何使用Unix分離令牌？

Question

如何使用Unix分離令牌？

[中]：

some sentences are like this. 
some sentences foo bar that 

[出來：]

some 
sentences 
are 
like 
this. 

some 
sentences 
foo 
bar 
that 

我可以在Python如下這樣做，但有任何UNIX的方式來實現相同的輸出？

>>> import codecs 
>>> outfile = codecs.open('outfile.txt','w','utf8') 
>>> intext = "some sentences are like this.\n some sentences foo bar that" 
>>> infile = codecs.open('infile.txt','w','utf8') 
>>> print>>infile, intext 
>>> for i in codecs.open('infile.txt','r','utf8'): 
...  for j in i.split(): 
...    print>>outfile, j 
...  print>>outfile 
... 
>>> exit() 

alvas@ubi:~$ cat outfile.txt 
some 
sentences 
are 
like 
this. 

some 
sentences 
foo 
bar 
that 

Answer 1

使用sed：

$ cat infile.txt 
some sentences are like this. 
some sentences foo bar that 
$ sed 's/\s\+\|$/\n/g' infile.txt > outfile.txt 
$ cat outfile.txt 
some 
sentences 
are 
like 
this. 

some 
sentences 
foo 
bar 
that 

Answer 2

sed -e 's/ \|$/\n/g' < text 

應該怎麼辦？

Answer 3

使用xargs的

xargs -n1 < file