I frequently get this error after I install SSL certificates. What is it and how can I fix it? Thank you in advance [root@s1 sites-enabled]# /etc/init.d/httpd start Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:80 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs [root@s1 sites-enabled]# /etc/init.d/httpd status httpd (pid 20238) is running... [root@s1 sites-enabled]# /etc/init.d/httpd stop Stopping httpd: [FAILED]