how to set port=80 in centos 7 code example

Example 1: centos 7 port open

firewall-cmd --zone=public --add-port=55555/tcp --permanent
firewall-cmd --reload

Example 2: how to allow traffic on port 8080 in centos 7

firewall-cmd --zone=public --permanent --add-port=8080/tcp

Example 3: how to allow traffic on port 8080 in centos 7

firewall-cmd --reload