Configure wildcard domain name resolution for a VM in Apache

In Apache, the virtual host is configured with wildcard domain name resolution ServerAlias. 1. multiple domain names are supported, for example, mail.linuxfly.org, smtp.linuxfly.org, and pop3.linuxfly.org are directed to the same virtual host, which can be written as www.2cto. comServerNamemail. linu... in Apache, the virtual host is configured with wildcard domain name resolution ServerAlias. 1. multiple domain names are supported. for example, mail.linuxfly.org, smtp.linuxfly.org, and pop3.linuxfly.org are directed to the same virtual host. they can be written as www.2cto.com ServerName mail. linuxfly. orgServerAlias smtp.linuxfly.org pop3.linuxfly.org ServerName is used to specify the preferred domain name. other domain names are specified by ServerAlias and separated by spaces. 2. support for wildcard domain name resolution ServerAlias support for delimiters. for example, we want all the second-level subdomain names under xx.a.com to be resolved using the same virtual host and can be set to www.2cto.com. ServerName xx.a.com ServerAlias * .xx.a.com DocumentRoot/var/www/htdocs/