Nginx日志会随着访问量而变大，较大的日志会影响分析日志时对日志的分析和处理，我们可以使用shell对Nginx日志进行定时分割，以周或者天，对于时间久的日志可以定时删除，减小磁盘的浪费

代码：

# cat logrotate.sh 

#!/bin/bash
#rotate Nginx logs
#writen by Aiker
PATH=$PATH://usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
logs_path=/var/log/Nginx
d=$(date -d "-1 day" +%F)
mv $logs_path/access.log $logs_path/access_${d}.log
mv $logs_path/error.log $logs_path/error_${d}.log
#向Nginx主进程发送USR1信号重新打开日志文件
kill -USR1 $(cat /var/run/Nginx.pid)

针对多个日志的切割：

#!/bin/bash
#rotate Nginx logs
#writen by Aiker
PATH=$PATH:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
logs_path=/var/log/Nginx
d=$(date -d "-1 day" +%F)
cd ${logs_path}
for logs in `ls *.log`
    do
        mv $logs $logs-$d
done

#向Nginx主进程发送USR1信号重新打开日志文件也可以：/bin/kill -HUP `cat $Nginx_pid`
kill -USR1 $(cat /var/run/Nginx.pid)

定时切割日志：
crontab -e

0 0 * * 0 /root/script/logrotate.sh > /dev/null 2>&1

# ll /var/log/Nginx/                         
total 64
-rw-r--r-- 1 Nginx root  3205 Feb 12 11:42 access_2018-02-11.log
-rw-r--r-- 1 Nginx root 41951 Feb 12 11:53 access.log
-rw-r--r-- 1 Nginx root 14441 Feb  9 10:12 error_2018-02-11.log
-rw-r--r-- 1 Nginx root     0 Feb 12 11:43 error.log