awk

Linux · Text · available in the simulator

What it does

Processes text by fields and rules.

Syntax

awk [opciones] 'programa' [archivo...]

Options and parameters

• -F

  Sets the input field separator.

  awk -F: '{print $1}' /etc/passwd
• -v

  Assigns a variable value before program execution.

  awk -v n=3 '{print $n}' datos.txt
• -f

  Reads the program source from a file.

• $1

  References the first field of each record; $0 is the entire record.

  awk '{print $1, $3}' datos.txt
• NR

  Current record number.

  awk 'NR>1' datos.csv
• NF

  Number of fields in the current record.

Usage examples

• awk '{print $1}' archivo
• awk -F: '{print $1}' /etc/passwd
• awk -v n=3 '{print $n}' datos.txt
• awk '{print $1, $3}' datos.txt
• awk 'NR>1' datos.csv

Related commands

• cat
• cut
• diff
• grep
• head
• less