Question
Is it possible to manage DNSSEC via command-line interface in Plesk?
Answer
Yes, it is possible to manage DNSSEC via CLI since 1.5.1 version.
Examples:
- 
To sign a domain with default settings: # plesk ext dnssec sign --domain-name example.com 
- 
To view DNSSEC information for a domain: # plesk ext dnssec info --domain-name example.com 
- 
To unsign a domain: # plesk ext dnssec unsign --domain-name example.com 
Make sure that DNSSEC extension is up to date.