Linux Awk Easy to understand

Source: Internet
Author: User
Awk simply understands
awk作用:过滤、输出内容$1 第一列, $2 第二列依次类推,NR行号,但$0表示一行,NF表示最后结尾一列-F 指定分隔符。例子:打印/etc/passwd文件的第一行(NR==1),$0 表示一行[[email protected] ~]# awk ‘NR==1 {print $0}‘ /etc/passwdroot:x:0:0:root:/root:/bin/bash例子:打印/etc/passwd文件的第一行,第六列内容[[email protected] ~]# awk -F ":" ‘NR==1 {print $6 }‘ /etc/passwd/root例子:打印/etc/passwd文件的第一行,最后一列($NF)[[email protected] ~]# awk -F ":" ‘NR==1 {print $NF}‘ /etc/passwd/bin/bash例子:打印/etc/password文件的第一行,第六列和最后一列[[email protected] ~]# awk -F ":" ‘NR==1 {print $6,$NF}‘ /etc/passwd/root /bin/bash

Linux Awk Easy to understand

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