[root@centos ~]# vi /etc/httpd/conf.d/virtual.conf
↓下記を記入
<VirtualHost *:80>
ServerName any
DocumentRoot /tmp
</VirtualHost>
<VirtualHost *:80>
ServerName server-manual.com
DocumentRoot /var/www/html
</VirtualHost>
<VirtualHost *:80>
ServerName virtual.server-manual.com
DocumentRoot /var/www/virtual
ErrorLog /var/log/httpd/virtual-error_log
CustomLog /var/log/httpd/virtual-access_log combined env=!nolog
</VirtualHost>
[root@centos ~]# mkdir /var/www/virtual
[root@centos ~]# systemctl reload httpd