Install certspotter by entering the following commands in the terminal:
sudo apt update sudo apt install certspotter
Description:
Certificate Transparency Log Monitor
Cert Spotter is a Certificate Transparency log monitor from SSLMate that alerts you when a SSL/TLS certificate is issued for one of your domains. Cert Spotter is easier than other open source CT monitors, since it does not require a database. It's also more robust, since it uses a special certificate parser that ensures it won't miss certificates. . Cert Spotter is also available as a hosted service by SSLMate,
Homepage: https://github.com/SSLMate/certspotter
Version: 0.8-1
Section: universe/devel