在CentOS上安裝和啟動Apache主要有兩種方法：通過包管理器（如yum）或從源代碼編譯
sudo yum install httpd
sudo systemctl start httpd
sudo systemctl enable httpd
sudo systemctl status httpd
如果Apache服務正在運行，你將看到類似以下輸出的信息：
● httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2021-06-21 10:00:00 UTC; 1min ago
Main PID: 12345 (httpd)
CGroup: /system.slice/httpd.service
└─12345 /usr/sbin/httpd -D FOREGROUND
現在，Apache已經成功安裝在CentOS上并啟動。你可以通過在瀏覽器中輸入服務器的IP地址或域名來訪問Apache的默認歡迎頁面。
