/*********************************************************************
* Author : Samson
* Date : 07/03/2014
* Test platform:
* 3.11.0-12-generic #19-Ubuntu
* GNU bash, version 4.2.45
* *******************************************************************/
将stdin的内容重定向到test文件(以覆盖文件内容的方式，若此文件不存在，则创建之)，且当stdin中含有EOF时完成写入：
ufo@ufo:/tmp$ cat > test << EOF> this is first line
> this is second line
> this is thrird line
> this is fourth line
> EOF
ufo@ufo:/tmp$ cat test
this is first line
this is second line
this is thrird line
this is fourth line
将stdin的内容重定向以添加的方式到已经存在test文件，且当stdin中含有EOF时完成写入：
ufo@ufo:/tmp$ cat >> test < EOF
bash: EOF: 没有那个文件或目录
ufo@ufo:/tmp$ cat >> test << EOF
> this is five line
> this is sixth line
> EOF
ufo@ufo:/tmp$ cat test
this is first line
this is second line
this is thrird line
this is fourth line
this is five line
this is sixth line
说明：以上的EOF可以为你想要的其它字符串。