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學習在Virtualmin安裝多個PHP版本,安裝失敗後,想請教大家!
目前環境是 :
Ubuntu Linux 18.04.6
Webmin version 2.111
Virtualmin version 7.10.0
(補充 : Apache Webserver)

1. 在安裝Virtualmin之前已有3個練習的網站
2. PHP版本步驟如下

           . step1 
   			sudo apt update
   			sudo apt upgrade -y				
   		. step2 添加 PHP PPA				
   			sudo apt install software-properties-common
   			sudo add-apt-repository ppa:ondrej/php
   			sudo apt update				
   		. step3 配置 PHP-FPM 池				
   			安装多个 PHP 版本，例如 PHP 7.4 和 PHP 8.0：				
   			sudo apt install php7.4 php7.4-cli php7.4-fpm php7.4-mysql
   			sudo apt install php8.0 php8.0-cli php8.0-fpm php8.0-mysql
   ```	
   
   
   

3. 發生 :

   Reading package lists... Done
   Building dependency tree
   Reading state information... Done
   E: Unable to locate package php7.4
   E: Couldn't find any package by glob 'php7.4'
   E: Couldn't find any package by regex 'php7.4'
   E: Unable to locate package php7.4-cli
   E: Couldn't find any package by glob 'php7.4-cli'
   E: Couldn't find any package by regex 'php7.4-cli'
   E: Unable to locate package php7.4-fpm
   E: Couldn't find any package by glob 'php7.4-fpm'
   E: Couldn't find any package by regex 'php7.4-fpm'
   E: Unable to locate package php7.4-mysql
   E: Couldn't find any package by glob 'php7.4-mysql'
   E: Couldn't find any package by regex 'php7.4-mysql'
   

請大家幫幫忙,或是給教學文件,先在這謝謝您的幫忙!!!