Have a look into [check_ssl_cert](https://github.com/matteocorti/check_ssl_cert) for certificate verification. Its also part of the [nagios-plugins-contrib](http://packages.ubuntu.com/search?keywords=nagios-plugins-contrib) package.
Have a look into [check_ssl_cert](https:/ /github. com/matteocorti /check_ ssl_cert) for certificate verification. Its also part of the [nagios- plugins- contrib] (http:// packages. ubuntu. com/search? keywords= nagios- plugins- contrib) package.