I’ve inherited a centos 7.5.1804 server which runs a wordpress site, an Java springboot app and an API.
Now when visiting the website(s) I get an certificate expired error: (see image)
There is a Plesk panel which I can not access and I do not know how the initial certificate was installed.
I have SSH access to the server.
which certbot, which certbot-auto letsencrypt and letsencrypt-auto all return command unknown.
What would be the easiest way to renew the certificate?