linux nl命令与逻辑页

http://www.gnu.org/software/coreutils/manual/coreutils.html#nl-invocation

The beginnings of the sections of logical pages are indicated in the input file by a line containing exactly one of these delimiter strings:

‘\:\:\:’
start of header;
‘\:\:’
start of body;
‘\:’
start of footer.

我的例子：

[root@localhost ~]# cat test01.txt
\:\:\:
header--01
\:\:
body--0001-line1
body--0001-line2
\:
footer--01
\:\:\:
header--02
\:\:
body--0002-line1
body--0002-line2
\:
footer--02
[root@localhost ~]# nl test01.txt

       header--01

     1  body--0001-line1
     2  body--0001-line2

       footer--01

       header--02

     1  body--0002-line1
     2  body--0002-line2

       footer--02
[root@localhost ~]#