[Nginx] 安裝網頁伺服器Nginx (CentOS8.2)

相較於Apache，Nginx消耗資源少，處理速度快，是大流量應用的較好的選擇。

(環境：CentOS8.2)

1. 開啟Terminal，使用「dnf」來安裝「Nginx」

[user@localhost ~]$ sudo dnf install -y nginx
...
...
...
Complete!    #看到這就行代表完成

2. 「Nginx」預設是沒有開啟的，重新開機也不會自動開啟，所以下指令

   [user@localhost ~]$ sudo systemctl start nginx   #現在馬上開啟nginx服務
   [user@localhost ~]$ sudo systemctl enable nginx  #之後開機也要自動開啟nginx服務
   

3. 確認 nginx 的服務狀態

   [user@localhost ~]$ sudo systemctl status nginx
   ● nginx.service - The nginx HTTP and reverse proxy server
      Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; vendor preset: disabled)
      Active: active (running) since Thu 2020-09-10 09:08:10 CST; 3min 51s ago
     Process: 2892 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)
     Process: 2890 ExecStartPre=/usr/sbin/nginx -t (code=exited, status=0/SUCCESS)
     Process: 2888 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited, status=0/SUCCESS)
    Main PID: 2893 (nginx)
       Tasks: 3 (limit: 49448)
      Memory: 5.7M
      CGroup: /system.slice/nginx.service
              ├─2893 nginx: master process /usr/sbin/nginx
              ├─2894 nginx: worker process
              └─2895 nginx: worker process
   
   Sep 10 09:08:10 localhost.localdomain systemd[1]: Starting The nginx HTTP and reverse proxy server...
   Sep 10 09:08:10 localhost.localdomain nginx[2890]: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
   Sep 10 09:08:10 localhost.localdomain nginx[2890]: nginx: configuration file /etc/nginx/nginx.conf test is successful
   Sep 10 09:08:10 localhost.localdomain systemd[1]: Started The nginx HTTP and reverse proxy server.