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
#!/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/ > /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
