systemctl start httpd # After changing the default port of Apache to 90, it prompts failure when starting Apache
< span style="font-size: 16px;">systemctl status httpd # View the status of Apache
You can see the prompt: Permission denied: AH00072: make_sock: could not bind to address [::]:90, meaning that permission was denied: AH00072: make_sock: could not bind to address [::]:90
This is caused by the SELinux security mechanism
Solution ：
semanage port -l | grep http # View the httpd ports currently supported
http_port_t tcp 80, 81, 443, 488, 8008, 8009, 8443, 9000
You can see that there is no port 90 at http_port_t
semanage port -a -t http_port_t -p tcp 90 # Add port 90 to SELinux
systemctl restart httpd # Restart the Apache server
netstat -ntlp | grep http # View the port status, as shown below , Indicating successful startup
