我试图在我的 ubuntu 18.04 上创建一个 Web 服务器，所以我安装了 Apache2，但我无法启动它。这是我运行systemctl status apache2.service命令时出现的内容
apache2.service - The Apache HTTP Server
Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled)
Drop-In: /lib/systemd/system/apache2.service.d
??apache2-systemd.conf
Active: failed (Result: exit-code) since Sat 2020-02-22 13:58:09 CET; 34s ago
Process: 2791 ExecStart=/usr/sbin/apachectl start (code=exited, status=1/FAILURE)
Feb 22 13:58:09 moemen apachectl[2791]: AH00558: apache2: Could not reliably determine the server's
Feb 22 13:58:09 moemen apachectl[2791]: (98)Address already in use: AH00072: make_sock: could not b
Feb 22 13:58:09 moemen apachectl[2791]: (98)Address already in use: …