# 启动nginxstart nginx.exe # windows
nginx -c /usr/local/nginx/conf/nginx.conf # Linux
# 优雅的停止nginxnginx -s stop# 立即停止nginxnginx -s quit# 重新打开日志文件nginx -s reopen# 平滑的重启nginx并重新加载nginx的配置文件nginx -s reload
# 可以用来修改配置文件之后，测试配置文件是否有语法错误nginx -t 

其实质是通过信号量来对nginx进行控制的，所以也可以通过下面的方式来控制nginx：kill -INT `cat /usr/local/nginx/logs/nginx.pid`[root@localhost logs]# kill -INT `cat /usr/local/nginx/logs/nginx.pid`[root@localhost logs]# ps -elf|grep nginx0 S root      3843  1306  0  80   0 -  1088 -      16:37 pts/1    00:00:00 grep nginx 看到nginx的两个进程被我们杀掉了。还有其他的信号量可以使用，分别对应到上面的命令。kill -HUP pid,  kill -USR1 pid, kill -USR2 pid 等等，总结如下：1. TERM,INT : Quick shutdown，立即关闭进程，不管他有没有在处理请求；2. QUIT : Graceful shutdown, 优雅的关闭进程，也就是等到该进程处理的请求都完成之后才关闭；3. HUP : Configuration reload, start the new worker processes with a new configuration. Gracefully shutdown the old worker processes4. USR1 : Reopen the log files, 重新打开日志文件，在备份日志按月/日分割日志时用；5. USR2 : Upgrade Executable on the fly, 平滑的升级；6. WINCH : Gracefully shutdown the worker processes, 优雅的关闭旧的进程（配合USR2来进行升级）;

worker_processes  1;events {    worker_connections  1024;}http {    include       mime.types;    default_type  application/octet-stream;    sendfile        on;    keepalive_timeout  65;        log_format  main  ‘$remote_addr - $remote_user [$time_local] "$request" ‘ ‘$status $body_bytes_sent "$http_referer" ‘ ‘"$http_user_agent" "$http_x_forwarded_for"‘;            server	  {				listen       80;				server_name pic.candy.com;								    		access_log  logs/access.log  main;    			  # 将http://pic.candy.com/pic请求重写到http://localhost:8080/back/pic				location ~ ^/pic/(.*)\.(png|jpg|gif)$				{				   rewrite ^/pic/(.*)\.(png|jpg|gif)$ http://localhost:8080/back/pic/$1.$2 break;				}  	}}