Olá amigos quando vo dar um start no meu Apache ta dando o seguinte erro

Starting web server (apache2)...apache2: Could not reliably determine the server's fully qualified domain name, using 10.0.0.50 for ServerName
(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
failed!

Alquem sabe o motivo