TERM, INT 快速关闭；
QUIT 从容关闭；
HUP 平滑重启，重新加载配置文件；
USR1 重新打开日志文件，在切割日志时用途较大；
USR2 平滑升级可执行程序；
WINCH 从容关闭工作进程；
【荔枝】
[root@localhost nginx]# nginx -c conf/nginx.conf
[root@localhost nginx]#
[root@localhost nginx]# ps -ef | grep nginx
root 2138 1 0 06:30 ? 00:00:00 nginx: master process nginx -c conf/nginx.conf
nobody 2139 2138 0 06:30 ? 00:00:00 nginx: worker process
nobody 2140 2138 0 06:30 ? 00:00:00 nginx: worker process
nobody 2141 2138 0 06:30 ? 00:00:00 nginx: worker process
root 2143 2083 1 06:30 pts/0 00:00:00 grep nginx
[root@localhost nginx]#
[root@localhost nginx]# ps -ef | grep nginx
root 2138 1 0 06:30 ? 00:00:00 nginx: master process nginx -c conf/nginx.conf
nobody 2139 2138 0 06:30 ? 00:00:00 nginx: worker process
nobody 2140 2138 0 06:30 ? 00:00:00 nginx: worker process
nobody 2141 2138 0 06:30 ? 00:00:00 nginx: worker process
root 2147 2083 3 06:32 pts/0 00:00:00 grep nginx
[root@localhost nginx]#
[root@localhost nginx]# kill -QUIT 2138
[root@localhost nginx]#
[root@localhost nginx]# ps -ef | grep nginx
root 2149 2083 2 06:32 pts/0 00:00:00 grep nginx
【nginx.conf 文件如下】： 第2行的 woker_processes 3; 表示nginx主进程 带有3个工作进程；
# this config is from 3-6
worker_processes 3;
events {worker_connections 1024;
}
http
{# first virtual host 第一个虚拟主机server{# ip and port monitored 监听的ip和端口listen 192.168.186.100:80;# host name 主机名称server_name 192.168.186.100;# the dir access_log saved 访问日志文件存放路径access_log logs/server1.access.log combined;location /{# default index file, priority reduction from left to right# 默认首页文件，顺序从左到右，index index.html index.htm;# the dir html file saved， html网页文件存放目录root /data0/htdocs/server1;}}# second virtual hostserver{listen 192.168.186.101:80;server_name 192.168.186.101;access_log logs/server2.access.log combined;location /{index index.html index.htm;root /data0/htdocs/server2;}}# third virtual hostserver {listen 192.168.186.102:80;server_name 192.168.186.102;access_log logs/server3.access.log combined;location /{index index.html index.htm;root /data0/htdocs/server3.com;}}
}
)
