Linux Shell script Programming--cut command

Cut

The Cut command extracts text columns from a text file or text stream.

Cut grammar

[[email protected] ~]# cut-d ' The delimiter character '-f fields <== used to have a specific delimiter character [[email protected] ~]# cut-c character interval            <== used to arrange neat information options and parameters:- D  : followed by delimited characters. Use with-F;  -F: Divides a piece of information into several segments according to the delimiter character of-D, and uses-F to remove the meaning of the paragraph;-C  : Remove the fixed character interval in the unit of character (characters);

The PATH variable is as follows

[Email protected] ~]# echo $PATH/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/x11r6/bin:/usr/games# 1 | 2       | 3 |   4       | 5            | 6            | 7

To take the path variable out, I'm going to find a fifth path.

#echo $PATH | Cut-d ': '-f 5/usr/local/bin

Take the path variable out and I'll find the third and fifth paths.

#echo $PATH | Cut-d ': '-f 3,5/sbin:/usr/local/bin

Take the path variable out and I'll find the third to last path.

echo $PATH | Cut-d ': '-f 3-

/sbin:/usr/sbin:/usr/local/bin:/usr/x11r6/bin:/usr/games

Take the path variable out and I'll find the first to third path.

#echo $PATH | Cut-d ': '-f 1-3

/bin:/usr/bin:/sbin:

Take the path variable out, I want to find the first to third, there is a fifth path.

echo $PATH | Cut-d ': '-f 1-3,5

/bin:/usr/bin:/sbin:/usr/local/bin

Practical Example: Display only/etc/passwd users and shells

#cat/etc/passwd | Cut-d ': '-f 1,7 root:/bin/bashdaemon:/bin/shbin:/bin/sh

Linux shell script programming--cut commands