(98)Address already in use: make_sock: could not bind to address [::]:80 : Fixed

To solve the given error:
Check which process is using the port number 80.

[root@www ~]# fuser 80/tcp
80/tcp:            17221

Hard-kill the process.

[root@www ~]# kill -9 17221

Now, just start the service.

[root@www ~]# systemctl start httpd

That’s all!