启动
启动代码格式：nginx安装目录地址 -c nginx配置文件地址
例如：
[root@sijizhen sbin]# /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
停止
nginx有三种停止方式：
从容停止
1.查看进程 ps -ef|grep nginx
[root@sijizhen sbin]# ps -ef|grep nginx
root 9862 1 0 01:04 ? 00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
nobody 9863 9862 0 01:04 ? 00:00:00 nginx: worker process
root 9886 1612 0 01:15 pts/0 00:00:00 grep nginx
2.杀死进程
[root@sijizhen sbin]# kill -QUIT 9862
快速停止
1、查看进程号
[root@sijizhen sbin]# ps -ef|grep nginx
root 9892 1 0 01:17 ? 00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
nobody 9893 9892 0 01:17 ? 00:00:00 nginx: worker process
root 9895 1612 0 01:18 pts/0 00:00:00 grep nginx
2.杀死进程
[root@sijizhen sbin]# kill -TERM 9892
强制停止
[root@sijizhen sbin]# pkill -9 nginx
重启
1、验证nginx配置文件是否正确
方法一：进入nginx安装目录sbin下，输入命令./nginx -t
[root@sijizhen sbin]# ./nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
说明配置文件正确！
方法二：在启动命令-c前加-t
[root@sijizhen sbin]# /usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
2、重启Nginx服务
方法一：进入nginx可执行目录sbin下，输入命令./nginx -s reload 即可
[root@sijizhen sbin]# ./nginx -s reload
方法二：查找当前nginx进程号，然后输入命令：kill -HUP 进程号 实现重启nginx服务
[root@sijizhen sbin]# ps -ef|grep nginx
root 9928 1 0 01:24 ? 00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
nobody 9935 9928 0 01:25 ? 00:00:00 nginx: worker process
root 9938 1612 0 01:26 pts/0 00:00:00 grep nginx
[root@sijizhen sbin]# kill -HUP 9928
参考：https://www.cnblogs.com/codingcloud/p/5095066.html