装过rpm包，在装源码包，结果源码包没法启动，关闭rpm包也失败，不知道怎么回事

[root@localhost apache2]# /usr/local/apache2/bin/apachectl start

httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain 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

[root@localhost apache2]# service httpd stop

Stopping httpd:                                            [FAILED]

阿帕奇没法启动，也关不了，怎么办