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This article mainly explains "how to use awk in Linux". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to use awk in Linux".

Command format awk 'condition 1 {Action 1} condition 2 {Action 2}.' File name built-in parameters

$0: represents the entire current line

$1: first field of each line

$2: second field per row

Record number of each line of NR

NF field quantity variable

Name of the file being processed by FILENAME

Separator

The default delimiter is the space-F specified delimiter

Awk-F':'{print $1}'/ etc/passwdawk-F:'{print "Line:" NR, "Col:" NF, "User:" $1}'/ etc/passwdawk-F':'{printf ("Line:%s Col:%s User:%s\ n", NR,NF,$1)}'/ etc/passwdawk-F':'{if ($3 > 100) print "User:" $1}'/ etc/passwd logical judgment

,!: matches regular expressions

Awk-F':'$1percent / ^ my.*/ {print $1}'/ etc/passwd

= =,! =, judge logical expression

Awk-F':'$3 > 100 {print $1 awk 3} / etc/passwd Thank you for your reading, this is the content of "how to use Linux awk". After the study of this article, I believe you have a deeper understanding of how to use Linux awk, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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