How to bind a domain name to a specified directory in a Linux server (LAMP)

I searched a lot of information online but couldn’t find what I wanted, so I came here to ask for help.
The server is a common linux file structure, there is no httpd.conf file

Ask God for guidance

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I searched a lot of information online but couldn’t find what I wanted, so I came here to ask for help.
The server is a common linux file structure, there is no httpd.conf file

Ask God for guidance

The problem has been solved.
apache2 binds multiple domain names in ubuntu