Hi Team,
Can I create the certbot ssl certificate for the second level subdomain..?
Example:
www.domain.example.com
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Yes. In principle that's possible.
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OK.. Actually I able to produce the SSL certificate for my main domain and subdomain ( Ex, example.com and *.example.com).
But when I enter the * . * .example.com, it shows more then one wildcard is found, so unable to produce the certificate.
If it's possible may I know how to do this.
Thank you
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You can't have two wildcard labels in a hostname indeed, that's forbidden. Also: you didn't ask about multiple (or any for that matter) wildcards in your openings post 
But you can have as much levels as you please (well, there probably is a limit somewhere), as long as there's only one (or none) wildcard label at the utmost left position.
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An LE cert can have up to 100 entries.
So, you could combine many "levels" into one cert.
Like:
*.example.com
*.sub1.example.com
*.sub2.example.com
*.sub3.example.com
*.sub4.example.com
*.sub1.extra1.example.com
*.sub2.extra1.example.com
*.sub3.extra1.example.com
*.sub4.extra1.example.com
*.sub1.extra2.example.com
*.sub2.extra2.example.com
*.sub3.extra2.example.com
*.sub4.extra2.example.com
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And most use cases don't need wildcards at all. You can just issue for some.long.multiple.label.name.example.com, though I think there can only be up to 10 or so labels maximum.
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