nginx signal

ps aux | grep nginx # View nginx process, to see the nginx pid, you have to use this command to view
********************* nginx signal ***** ******************
the following are pid use nginx's master process pid
1. -INT the kill pid # Quick kill the shutdown process
2. kill -QUIT pid #graceful shutdown gracefully shutdown process, ie after the end of the request and so close. (For example, someone downloading files, and so he downloaded and then kill)
3. the kill -HUP pid # graceful restart, when the modified configuration file without restarting nginx (Apache must be restarted after modifying the configuration file to take effect). Use this command.
4. kill -USER1 pid # split logs will be used to (https://www.php.cn/code/23825.html split logs need to see this section, some knowledge is not easy to take notes)
5. the kill - HUP `cat logs / nginx.pid` #cat logs / nginx.pid returned pid is the main process of nginx, the benefits of using this is do not always go to see the nginx's pid.