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This article will explain in detail about the use of awk command text and data processing linux programming language, Xiaobian feel quite practical, so share to you as a reference, I hope you can read this article after harvest.

The awk command is a programming language for processing text and data under linux/unix.

And it supports user-defined functions and dynamic regular expressions and other advanced features, linux/unix is a powerful programming tool.

Syntax format: awk [parameter] [file]

Common parameters:

-F Specify field delimiters to use when entering-v Custom variables-f Read awk command from script-m Set inherent limits on val values

Reference Example

Print the second and third fields of each line:

[root@linuxcool ~]# awk '{ print $2,$3 }' file

Modify the output separator symbol, special characters need to escape:

[root@linuxcool ~]# awk -v OFS="~"'{print $1,$NF}'  demo.txt Welcome~blog.  This~file.

Output passwd characters in a specific format:

[root@linuxcool ~]# awk -F: '{printf "%-15s->s ->%20s\n",$1,$(NF-3),$NF}' /etc/passwd|head -2

Print the first field of the line with uid greater than or equal to 500 and beginning with m on the system:

[root@linuxcool ~]# awk -F: '$3>=500 && $1 ~ /^m/{print $1}' /etc/passwd

The third field has zero print, and zero only, fuzzy match and exact match:

[root@linuxcool ~]# awk-F: '$3~0{print}'/etc/passwd About the use of awk command text and data processing programming language shared here, I hope the above content can be of some help to everyone, you can learn more knowledge.   If you think the article is good, you can share it so that more people can see it.

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