operation system: 
fedora38




# firewall setting:
sudo systemctl stop firewalld
sudo systemctl status firewalld
sudo systemctl disable firewalld



# selinux setting
/usr/sbin/sestatus
sudo vim /etc/selinux/config
####
SELINUX=disabled
####








sudo yum install nginx

sudo systemctl start nginx

sudo systemctl status nginx



sudo vim /etc/nginx/nginx.conf
####
    server{
    listen    8090;
    }
####






killall nginx
# equal to this:
pa aux | grep nginx | awk '{print $2}' | sudo kill -9





# if you do not want to diaabled selinux:
sudo semanage port -l | grep 8090
sudo semanage port -a -t http_port_t -p tcp 8090