shell命令-cut

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用途

从输入文件中选择一个或多个字符或字段

语法

cut -b… LIST

cut -c… LIST

cut -d… LIST

cut -f … LIST

描述

-b：以字节定位

-c：以字符定位

-d：选择分割符代替TAB

-f：以域定位

LIST用以下range表示：

   N      N'th byte, character or field, counted from 1   N-     from N'th byte, character or field, to end of line   N-M    from N'th to M'th (included) byte, character or field   -M     from first to M'th (included) byte, character or field

举例

apuser@bj61087pcu:~$ whoapuser   tty7         2016-03-10 08:39apuser   pts/2        2016-03-10 14:00 (:0)apuser   pts/3        2016-03-11 17:29 (:0)apuser   pts/4        2016-03-14 09:31 (:0)apuser@bj61087pcu:~$ who | cut -b 3uuuuapuser@bj61087pcu:~$ who | cut -d"p" -f 2user   tty7         2016-03-10 08:39user   user   userapuser@bj61087pcu:~$ who | cut -b 1-6apuserapuserapuserapuserapuser@bj61087pcu:~$ who | cut -c 2pppp看到某个帖子说了-c和-b的区别，下面是例子解释：[rocrocket@rocrocket programming]$ cat cut_ch.txt星期一星期二星期三星期四[rocrocket@rocrocket programming]$ cut -b 3 cut_ch.txt����[rocrocket@rocrocket programming]$ cut -c 3 cut_ch.txt一二三四但是我运行了一下，发现不对，以后再做补充

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