Create SSL Certificate wildchard (not www protect)

I want create a wildcard certficate to protect my website on HTTPS.

My domain is (for example):

I use this command:

./certbot-auto --server -d "" -d "*" --preferred-challenges=dns --manual certonly

But the certificate generated with this command is valid in this mode:

  • (valid)
  • www.example.t (not valid)

Why is not valid?

I want to ask you to write me the true command for create a SSL certificate for my domain:


Thanka a lot!

It would be valid. That wildcard certificate would definitely cover

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