- 1.[[email protected] ~]$ echo $PATH | awk 'BEGIN{FS=":"}''{print $0}'
- /usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/4/.local/bin:/home/4/bin:/home/16116374/test
- [[email protected] ~]$ echo $PATH | awk 'BEGIN{RS=":"}''{print $0}'
- /usr/local/bin
- /usr/bin
- /usr/local/sbin
- /usr/sbin
- /home/4/.local/bin
- /home/4/bin
- /home/4/test
RS 会根据制定的分隔符换行
- 2.[[email protected] ~]$ echo $PATH | awk 'BEGIN{FS=":"}''{print $0}'
- /usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/4/.local/bin:/home/4/bin:/home/4/test
- 3.[[email protected] ~]$echo $PATH | awk 'BEGIN{FS=":"}''{print $1}'
- /usr/local/bin
科学计算与词典使用
- 4.awk 'BEGIN{print 3*7}'
- 21
- 5.echo | awk '{print 3*7}'
- 21
- 6.awk 'BEGIN{printf"%.3f\n",3/7}'
- 0.429
- 7.awk 'BEGIN{printf"%.f\n",3/7}'
- 0
- 8.awk 'BEGIN{printf"%.1f\n",3/7}'
- 0.4
- 9.seq 10 2 20
- 10
- 12
- 14
- 16
- 18
- 20
步数为 2
- 10.seq 10 2 20 | awk '{sum+=$1}{print sum}'
- 10
- 22
- 36
- 52
- 70
- 90
- 11.seq 10 2 20 | awk '{sum+=$1}{print sum,NR}'
- 10 1
- 22 2
- 36 3
- 52 4
- 70 5
- 90 6
- 12.seq 10 2 20 | awk '{sum+=$1}{print sum/NR}'
- 10
- 11
- 12
- 13
- 14
- 15
- 13.seq 10 20 | awk '$1>19'
- 20
大于 19
- 14. seq 10 2 20 | awk '$1>14 {data[NR]=$1}{for (k in data) print data[k]}'
- 16
- 16
- 18
- 16
- 18
- 20
- 15.seq 10 2 20 | awk '$1>14 {data[NR]=$1}END{for (k in data) print data[k]}'
- 16
- 18
- 20
awk 进阶
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