SSH from my Android tablet to my Ubuntu machine

SSH from my Android tablet to my Ubuntu machine

I believe I have finally have the prerequisite knowledge from asking other
questions: question1 and question2 on this site.
I wish to SSH from my Android Tablet (probably with SSH client Connect
Bot) to my Ubuntu machine, which runs Ubuntu 12.04 LTS. This is what I
have done so far:
Installed openssh-server on my Ubuntu machine.
Verified that my sshd_config file permits PubKeyAuthentication
From the Ubuntu documentation under SSH Keys from the server we can give
access to a remote machine by following the instructions which will give
the remote machine the public key.
This is done by the command: ssh-copy-id username@remotehost
Since I wish to connect to my Ubuntu machine remotely through my tablet I
need to know the identity/address of my tablet which is referred to as
username@remotehost in the documentation. This leads to the following
question:
Question1: What is the value of: username@remotehost for my Android
tablet? Please give example values and comment on whether these values can
change?
Suppose, I sufficiently completed the previous step. Then from my tablet I
should be able to open the connect bot application and connect to my
Ubuntu machine. When I open connect bot I get a prompt like the following:
username@hostname:port, which would allow me to connect to another machine
with that identity. This leads to the following question:
Question2: What is the value of username@hostname:port for my Ubuntu
Machine? Please give example values and comment on whether these values
can change?
I believe the information I have presented is clear, accurate and
sufficient in answering my questions. However, as I do not have any
experience with networking perhaps I have not included enough information.
Please let me know if you need more information and thanks in advance for
all the help!