root@ubuntu:/etc/init.d# apache2 -k startapache2: Could not determine the server's fully qualified domain name, using 127.0.0.1 for ServerName(98): make_sock: could not bind to address [::]:80no listening sockets available, shutting down
/etc/init.d/apache2 start
Usage: apache2 [-D name] [-d directory] [-f file] [-C "directive"] [-c "directive"] [-k start|restart|graceful|stop] [-v] [-V] [-h] [-l] [-L] [-t] [-S]