--查看ngix是否在运行
[root@localhost sbin]# ps aux|grep nginx
root 953 0.0 0.0 3492 516 ? Ss 07:09 0:00 nginx: master process ./nginx
nobody 954 0.0 0.0 3676 876 ? S 07:09 0:00 nginx: worker process
root 967 0.0 0.0 4356 724 pts/2 S+ 07:12 0:00 grep nginx
--其中master为主进程
--其中worker真正工作者
--杀掉nginx进程
--nginx的信号控制
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TERM,INT | Quick ShutDown
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QUIT | Graceful shutdown 优雅的关闭进程，即等请求结束后再关闭
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HUP | Configuration reload,Start the new worker processes with a new configuration Gracefully shutdown the old worker process
| 改变配置文件，平滑的重读配置文件
----------------------------------------------------
USR1 | Reopen the log files 重读日志，在日志按月/日分割时有用
----------------------------------------------------
USR2 | Upgrade Executable on the 繁荣的凉面 平滑的升级
----------------------------------------------------
WINCH | Gracefully shutdown the woreker processes 优雅的关闭旧的进程（配合USR2来进行升级）
-----------------------------------------------------
kill -INT (进程号)
kill -HUP (进程号)
kill -USER1 (进程号)（日志切割）
--touch ./logs/access.log
kill -信号控制 'cat logs/nginx.pid(等于进程号)'
转载于:https://my.oschina.net/u/993551/blog/345751