shell十二篇中的sort问题

jidi_78

[sam@Linux_chenwy sam]$ sort -t: +2 video.txt
Alien:HK:119:1982
Boys in Company C:HK:192:2192
Toy Story:HK:239:3972
Star Wars:HK:301:4102
A Few Good Men:KL:445:5851
Aliens:HK:532:4892
The Hill:KL:63:2972

上面是shell十二篇中的例子，但在我机器上确不能执行，返回的错误结果如下
sort: open failed: +2: No such file or directory


sort --version后的信息如下：
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Mike Haertel and Paul Eggert.

大家帮忙看一下是什么问题？

blackold

版本问题。
+n -n是老用法，使用-k选项吧。

jidi_78

看来历史问题。。。谢谢黑哥