linux open ports

1. Temporary port, invalid after restarting the firewall or server

firewall-cmd --zone=public --add-port=8053/tcp

2. Permanent Port

# Permanently open the port, you need to restart the firewall after executionfirewall-cmd --permanent --zone=public --add-port=80/tcpfirewall-cmd --reload refresh takes effect

3. View the list of open ports

# linux View the list of open portsfirewall-cmd --list-all

Firewall on and off

1, restart, close, open firewalld.service service

service firewalld restart restartservice firewalld start openservice firewalld stop shutdown

2. View firewall service status

systemctl status firewall

3. Check the status of firewall

firewall-cmd --state