Text Analysis tool awk Simple example

Create a file first: Vim hi

Take the 2nd field and the 3rd field:

awk ' {print $2,$3} ' Hi Note {}, the comma will be converted to a space at the time of output

Add character Description:

Show entire line:

Specify field delimiter:-F

Built-in variables: NF NF: Number of fields, $NF represents the last field

NR: Number of rows

/regular expression/: Handles only rows that can be matched to a pattern here

Take reverse: awk '!/^john/{print ' Hi

The above statement indicates that if the third field is greater than or equal to 500, the first and third fields are taken

determines whether the last field is/bin/bash, and prints the first and last fields if yes

do pattern matching

Cat hi

do line range matching

Get Line Range:

If condition Judgment statement: Determines whether the value of the third field is greater than 500

Character substitution:

echo "This is a test" | awk ' gsub ("test", "abd") '

Text Analysis tool awk Simple example