Actually, for OBH this is the International section, because there is no Spanish one.
Telnet or ssh commands can be given accordingly to the operative system of your PC (obviously, connected to the same LAN of your box).
If you had just searched a little bit, you would find:
In windows, entering the command prompt;
in MacOs or Linux by terminal;
and in those environments just using the command line
telnet IP_OF_YOUR_BOX
or
ssh IP_OF_YOUR_BOX
There are also other ways, depending on what OS we are talking about.