rpm -ivh nginx-1.18.0-2.el7.ngx.x86_64.rpm 

systemctl start nginx  启动
systemctl stop nginx   关闭

systemctl list-unit-files | grep nginx

systemctl enable  nginx

setsebool -P httpd_can_network_connect 1 
setenforce 0

配置所在目录：/etc/nginx/

2) PID目录：/var/run/nginx.pid

3) 错误日志：/var/log/nginx/error.log

4) 访问日志：/var/log/nginx/access.log

5) 默认站点目录：/usr/share/nginx/html