Bash awk 基本入门
Awk ‘patten {action}’ file
Akw command is used to handle fields in one line.
Analize every line in the file, and if the line match the patten, then do the action.
pattern field is optional.
$0 indicates the whole line.
The first field is $1.
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[braveyly@m-net ~]$ cat awk.txt liwei 27 male hust lijing 24 femaile cnnu hujuan 22 female cnnu hurui 18 male hust [braveyly@m-net ~]$ awk '$2 > 23 {print $1, $3, $4}' ./awk.txt liwei male hust lijing femaile cnnu [braveyly@m-net ~]$ awk '$4 == "hust" {print $0}' ./awk.txt liwei 27 male hust hurui 18 male hust [braveyly@m-net ~]$ awk '$4 ="hust" {print $0}' ./awk.txt liwei 27 male hust lijing 24 femaile hust hujuan 22 female hust hurui 18 male hust |
awk -Fchar '{action}'
Seperate the line into different fileds by single char.
No blank is between -F and char.
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[nick@d01 bash]$ cat sort4.txt [nick@d01 bash]$ awk -F: '{print $7}' ./sort4.txt |
-F argument indicates the separator of fields.