awk

http://coolshell.cn/articles/9070.html

[0;31;40m5

^[[0;31;40m5.925^[[0m

awk 'substr($4, 11, 10) > 5'  ****


ls /data/nginx/logs/access_2014123*.bz2 | xargs -i tar -xjvf {}

grep "task_id=corp_466765_113506124" access_2014121[5,6].log > 20141215_vcf5.txt
awk '{print $10}' 20141215_vcf5.txt > dps_task.txt

实例：
awk '$12==502' /data/nginx/logs/access.log   nginx 日志查询返回502的例子
awk 'substr($12, 11, 3)==502'/data/nginx/logs/access.log