How to get ssh conection to ucs

hello
i would like to enter the Terminal of my ucs to add munin-node and vim-nox!
if i will connect he ask for a file

so how to connect, or how to get a CLI access?

have a nice day
vinc

my teraTerm is asking for a DSA/RSA…-Schlüssel - where should i download them to get ssh access to my UCS?

have a nice day
vinc