subdomain with www is not working !!!!

[yusha]

Add that in the /etc/sentora/configs/apache/httpd-vhosts.conf where you will find the subdomains referenced, and that is the file called by the main apache config. I think you'll need a ServerAlias www.your.subdomain.com
I believe you should update your host dns records as well for it to work. I might test it later and confirm.

Yeah I have seen that file. Please Give me step by step method if it works for you