Installing LEMP

I want to install a LEMP stack. I've found in the docs how to install nginx: https://docs.directadmin.com/webservices/nginx/general.html

It say to use this:

Do I ssh to my server and type that in?

Also, I know how to install LEMP using SSH. Is doing it that way mean I miss out something compared to the way shown in the docs?

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